Position Title: Maintenance Manager – Industrial HVAC Location : Gurugram (Travel Required) Experience : 5+ years in industrial HVAC systems, facility maintenance, or manufacturing environments Availability : Immediate Joiners Preferred About the Role Sigma Airtech Engineers Pvt. Ltd. is seeking a dedicated Maintenance Manager with niche expertise in industrial HVAC systems . This role is critical in leading maintenance activities across multiple project or plant locations, focusing on system uptime, preventive maintenance, safety, and reliability. You will manage a team of HVAC and facilities technicians, coordinate with vendors and contractors, and ensure 100% readiness of air-conditioning and ventilation systems in high-value industrial and institutional setups. Key Responsibilities Lead and manage a multi-site team of HVAC maintenance technicians and engineers. Ensure HVAC systems (Chillers, VRF/VRV, AHUs, TFAs, exhaust and ventilation systems) operate at peak efficiency and uptime. Design and implement preventive and predictive maintenance programs tailored to HVAC plant assets and critical loads. Develop innovative technical solutions for recurring HVAC breakdowns, performance deviations, and energy inefficiencies. Serve as the point of escalation during HVAC emergencies, including BMS alerts, shutdowns, and temperature compliance failures. Manage AMC and warranty follow-ups with OEMs for major HVAC equipment. Conduct regular audits and inspections to verify system performance, filter schedules, duct cleaning, insulation integrity, and refrigerant pressure checks. Collaborate with the Safety and Operations teams. Drive technical training and upskilling programs for the HVAC maintenance team. Create and track maintenance KPIs , spare part usage, energy performance, and downtime reports. Participate in site-level energy audits and retrofitting decisions for HVAC systems. Plan and manage HVAC-related capital expenditure projects with proper documentation and vendor management. Own CMMS data entries, schedules, and maintenance histories for all HVAC assets. Coordinate with maintenance teams at various sites/plants to ensure standardized practices, share learnings, track common issues, and implement cross-site improvements. Basic Qualifications Bachelor’s degree in Mechanical Engineering or related technical field Minimum 5 years of experience in HVAC project maintenance in industrial, commercial, or institutional facilities Proficiency in understanding HVAC drawings, BMS control logics, and operating sequences Preferred Qualifications Experience with: Centralized HVAC systems (Chillers, Cooling Towers, Oil Chillers) VRF/VRV systems and their servicing schedules AHUs, TFAs, FCUs, and related ducting systems Building Management Systems (BMS) Energy-saving retrofits and controls Strong vendor negotiation and contract handling skills Excellent written and verbal communication for inter-department coordination Knowledge of Six Sigma, Kaizen, or Lean principles is a plus Travel Travel across multiple plant and project sites How to Apply Email your CV to: sigmaairtechhr@gmail.com Salary: Competitive & Negotiable based on experience Show more Show less
Job Title: MEP Billing Engineer Location : Gurgaon HQ / Project Sites (as required) Experience : 5-7 years in MEP or HVAC project billing Employment Type : Full-time - Immediate Joiners Preferred Industry : HVAC Projects / MEP Contracting / EPC About Us Sigma Airtech Engineers Pvt. Ltd. is a fast-growing EPC firm specializing in HVAC & MEP solutions for industrial, institutional, and commercial projects. We’re looking for an experienced and detail-oriented MEP Billing Engineer who will be responsible for managing, verifying, and certifying all billing-related aspects of HVAC, Electrical, and Plumbing works across multiple projects. Key Responsibilities Prepare and certify client and subcontractor bills based on verified site progress for HVAC and allied MEP works. Work closely with site engineers and project execution teams to gather joint measurements and validate billing quantities. Maintain and regularly update BOQ (Bill of Quantities) and align billing with actual execution and change orders. Verify subcontractor invoices , ensuring accuracy with site execution and contract scope. Ensure timely submission of Running Account (RA) bills , material reconciliation , and associated documentation. Coordinate with the procurement and planning teams for tracking cost against project budgets. Interface with clients, consultants, and third-party engineers during billing verifications and joint certifications. Support billing with accurate Measurement Books (MBs) , as-built drawings, work checklists, and scope confirmation. Assist in contract management, including change orders, amendments, rate justifications , and claims. Identify discrepancies in site execution vs. billing quantities and propose necessary rectifications. Maintain logs for all billing submissions, approvals, and client certification/payment tracking . Assist in documentation during audits, client handovers, and project closure processes . Qualifications & Skills Education : Bachelor's Degree/Diploma in Mechanical, Electrical, or Building Services Engineering Experience : 5–7 years of relevant experience in HVAC or MEP billing roles , preferably with EPC or contracting firms Technical Skills : Strong in AutoCAD, MS Excel , and project documentation Understanding of HVAC, Electrical, Plumbing, and Fire Fighting systems Familiar with GST billing formats, project taxation norms, and commercial terms Experience in MEP estimation, BOQ interpretation, and rate analysis Other Skills : Attention to detail in documentation and quantity verification Strong communication for site-team coordination and client follow-ups Proactive in resolving disputes and billing issues Organized in maintaining logs and certifications Compensation Negotiable based on experience & skillset How to Apply Send your resume to sigmaairtechhr@gmail.com Show more Show less
Job Title: MEP Billing Engineer Location : Head Office (Gurugram) Experience : 4-8 years in MEP or HVAC Project Billing Employment Type : Full-time - Immediate Joiners Preferred Industry : HVAC Projects / MEP Contracting / EPC Reports To: General Manager About Us Sigma Airtech Engineers Pvt. Ltd. is a fast-growing EPC firm specializing in HVAC & MEP solutions for industrial, institutional, and commercial projects. We’re looking for an experienced and detail-oriented MEP Billing Engineer who will be responsible for managing, verifying, and certifying all billing-related aspects of HVAC, Electrical, and Plumbing works across multiple projects. Job Summary: We are looking for a meticulous and result-oriented MEP Billing Engineer to manage all aspects of billing for HVAC, Electrical, Plumbing, and Fire Fighting works. The ideal candidate will be responsible for preparing, verifying, and raising Running Account (RA) bills to clients/customers, certifying subcontractor bills, checking site quantities, maintaining cost control, and supporting overall commercial aspects of project delivery. Key Responsibilities: 1. Billing & Client Coordination: Prepare and raise RA Bills to clients/customers as per work progress. Prepare and certify subcontractor/vendor bills and ensure alignment with actual site execution. Ensure timely submission of client bills along with all necessary supporting documents (MBs, progress photos, checklists, etc.). Reconcile certified quantities with site measurements and tender BOQ. Coordinate with the client’s billing/certification teams for approval and clearance of payments. 2. Quantity Verification & Rate Checking: Cross-check quantities executed on-site against GFC drawings, approved shop drawings, and BOQs. Verify rate applicability as per work orders/LOAs for both client and subcontractor billing. Support the commercial team in analyzing variation claims and rate justifications. 3. BOQ, Change Orders & Documentation: Maintain and update Bill of Quantities (BOQ) in alignment with design changes and site execution. Support in preparation of variation/extra item billing with proper supporting and documentation. Track material consumption and prepare reconciliation reports periodically. Identify scope deviations and raise necessary change order proposals. 4. Coordination & MIS: Liaise with project managers, site engineers, planning and procurement teams for billing inputs. Coordinate with clients, consultants, and auditors for billing clarification and document submission. Prepare and maintain billing registers, cost logs, and monthly MIS reports for internal review. Follow up for timely payment certifications and track outstanding receivables. 5. Compliance & Cost Control: Ensure adherence to tax structures, GST formats, and statutory compliance in billing. Track cost-to-completion and support in cash flow forecasting based on billing trends. Assist in project close-out documentation, including final bills and as-built reconciliation. Required Qualifications & Skills: Education: Diploma / B.E. / B.Tech in Mechanical, Electrical, or related engineering field. Experience: 4–8 years of experience in MEP billing, quantity verification, and RA billing in MEP projects/ HVAC projects. Technical Skills: Proficient in MS Excel, AutoCAD, and Measurement Books (MBs). Good understanding of MEP systems – HVAC, Electrical, Plumbing, and Fire Fighting. Other Skills: Excellent numerical and analytical skills. Strong attention to detail and documentation accuracy. Effective communication and coordination skills. Ability to work under pressure and meet billing deadlines. Job Type: Full-Time Pay Range: ₹3.0 LPA – ₹6.0 LPA (Based on experience and capabilities) Work Schedule: Day Shift | 6-day Work Week Location: Head Office (Gurugram)
The Maintenance Manager for Industrial HVAC position at Sigma Airtech Engineers Pvt. Ltd. in Gurugram requires a professional with over 5 years of experience in industrial HVAC systems, facility maintenance, or manufacturing environments. Immediate joiners are preferred for this critical role that involves leading maintenance activities across multiple project or plant locations. Your responsibilities will include ensuring peak efficiency and uptime of HVAC systems such as Chillers, VRF/VRV, AHUs, TFAs, exhaust, and ventilation systems. You will be managing a team of HVAC and facilities technicians, coordinating with vendors and contractors, and overseeing the readiness of air-conditioning and ventilation systems in industrial and institutional setups. As the Maintenance Manager, you will lead a multi-site team of HVAC maintenance technicians and engineers, design preventive maintenance programs, develop technical solutions for HVAC breakdowns, and manage emergencies. Additionally, you will handle AMC and warranty follow-ups, conduct system audits, collaborate with safety and operations teams, drive technical training programs, track maintenance KPIs, participate in energy audits, and manage capital expenditure projects related to HVAC systems. The basic qualifications for this role include a Bachelor's degree in Mechanical Engineering or a related technical field, along with a minimum of 5 years of HVAC project maintenance experience in industrial, commercial, or institutional facilities. Proficiency in understanding HVAC drawings, BMS control logics, and operating sequences is essential. Preferred qualifications include experience with centralized HVAC systems, VRF/VRV systems, AHUs, TFAs, FCUs, BMS, energy-saving retrofits, vendor negotiation, and contract handling. Strong communication skills and knowledge of Six Sigma, Kaizen, or Lean principles are advantageous. This role involves travel across multiple plant and project sites. To apply for this position, please email your CV to sigmaairtechhr@gmail.com. The salary offered is competitive and negotiable based on experience.,
Job Title: HVAC Design Engineer Location : Gurugram Experience : 3-6 years Qualification : B.E./B.Tech in Mechanical Engineering or equivalent Job Summary : We are hiring a HVAC Design Engineer responsible for planning, designing, and optimizing HVAC systems for diverse projects, ensuring compliance with international standards and energy efficiency norms. Key Responsibilities : Develop HVAC system designs using AutoCAD, Revit, or other design tools Perform load calculations, equipment selection, and duct sizing Prepare design documentation, technical specifications, and BOQs Coordinate with clients, architects, and other consultants Ensure designs comply with ASHRAE, ISHRAE, and other relevant codes Provide technical support to project execution teams Requirements : 3+ years of experience in HVAC design for commercial/residential/industrial projects Strong analytical skills Deep knowledge of ventilation, chilled water systems, VRV/VRF Good communication and coordination abilities
Job Title: HVAC Quantity Surveyor Location: Gurgaon (Head Office) Employment Type: Full-time | Immediate Joiners Preferred Department: HVAC – Projects (EPC / Contracting) Reports To: Project Manager / GM – MEP Job Summary: We are seeking a highly skilled and detail-oriented HVAC Quantity Surveyor to manage the commercial and contractual aspects of HVAC projects from pre-contract to post-contract stages. The ideal candidate will be responsible for cost estimation, quantity take-off, tendering, rate analysis, billing verification, and variation management while ensuring profitability and cost control throughout the project lifecycle. Key Responsibilities: 1. Quantity Take-off & Estimation Prepare detailed quantity take-offs from GFC and IFC drawings for HVAC systems (ducting, piping, insulation, and equipment). Estimate material, labour, and installation costs based on design and specifications. Support the proposal and tendering team with accurate BOQ and cost estimates. Prepare rate analysis for new or non-scheduled items and assist in bid preparation. 2. Pre-Contract Activities Review tender documents, specifications, and scope of work for HVAC systems. Identify inclusions, exclusions, and commercial risks during bidding. Assist in vendor quotations and cost benchmarking for equipment and services. Participate in pre-bid meetings and technical clarifications with consultants or clients. 3. Post-Contract Management Verify subcontractor and vendor bills against executed quantities and contractual terms. Prepare Running Account (RA) bills and final bills for submission to clients. Track and maintain BOQ vs. actual executed quantities, identifying deviations and variations. Support in preparation of variation claims, change orders, and rate justifications. Ensure timely submission and certification of bills through proper documentation (MBs, drawings, and reports). 4. Cost Control & Reporting Maintain cost tracking sheets and support the project team with budget-to-actual analysis. Identify cost-saving opportunities and support the procurement team in negotiation. Prepare and submit monthly cost and progress reports (MIS) to management. Assist in cash flow projections, project forecasting, and profitability analysis. 5. Coordination & Compliance Coordinate closely with project, design, planning, and procurement teams for technical and commercial alignment. Liaise with clients, consultants, and auditors for joint measurement and certification. Ensure adherence to company billing standards, tax formats (GST/TDS), and compliance requirements. Qualifications & Skills Education: Diploma / B.E. / B.Tech in Mechanical Engineering or related discipline. Experience: 4–8 years of relevant experience in HVAC Quantity Surveying, Cost Estimation, or Billing within contracting or EPC environments. Technical Skills: Strong understanding of HVAC systems (Chillers, VRF/VRV, AHUs, TFAs, Ducting, Piping, Insulation, Controls). Proficiency in AutoCAD, MS Excel, and costing/billing software (Tally ERP or equivalent). Familiarity with project contracts, BOQ formats, and standard measurement practices. Knowledge of IS/ASHRAE standards is an added advantage. Soft Skills: Excellent analytical and numerical abilities. Strong attention to detail and documentation accuracy. Good communication and coordination skills for dealing with clients and internal teams. Ability to work independently under pressure and meet deadlines. Compensation: ₹3.6 – ₹6.5 LPA (Negotiable based on experience and skillset) Work Schedule: Monday to Saturday | Day Shift Travel to project sites as per requirement
Job Title: Accountant Location : Gurgaon (Head Office) Experience : 3–5 years Industry : HVAC Projects / EPC / Contracting Employment Type : Full-time | Immediate Joiners Preferred About the Role Sigma Airtech Engineers Pvt. Ltd. is looking for a diligent and detail-oriented Accountant to join our in-house finance team. The candidate will be responsible for handling project-based accounting, vendor reconciliations, inter-branch transactions, statutory compliance, and supporting the finance lead in monthly financial closure and reporting. Key Responsibilities General Accounting & Bookkeeping Maintain accurate books of accounts using Tally or ERP software. Post journal entries, manage ledgers, and support month-end closures. Maintain proper documentation and filing of invoices, bills, and supporting documents. Reconciliation & Reporting Perform bank, vendor, and inter-company reconciliations regularly. Prepare and maintain project-wise costing and profitability statements. Track advances, retentions, and mobilization amounts on a project basis. Reconcile site expenses, material entries, and subcontractor bills. Financial Reporting Support in preparation of monthly/quarterly MIS reports, P&L statements, balance sheets, and cash flow reports. Assist the finance head in analysing cost deviations and budgeting variances. Invoicing & Receivables Raise client invoices in coordination with the billing team. Maintain collections and payment follow-up records. Coordinate with project teams for work certification and billing schedules. Statutory Compliance Ensure timely filing and payment of GST, TDS, PF, ESI, and professional tax. Assist in preparation for internal and external audits by providing all necessary documentation. Stay up to date with applicable taxation laws and financial regulations. Stakeholder Coordination Coordinate with site engineers, procurement teams, vendors, and clients for financial documentation. Collaborate with purchase and operations teams to ensure accuracy in inventory and asset booking. Process Improvements Identify and implement automation or improvements in accounting and reporting processes. Help digitize and standardize expense and project documentation formats. Required Skills & Qualifications Bachelor’s degree in Commerce or Accounting 3–5 years of relevant accounting experience, preferably in EPC or project-based companies Strong working knowledge of Tally ERP, MS Excel, and standard accounting practices Good understanding of project billing cycles, taxation, and statutory compliance Excellent organizational, communication, and interpersonal skills Ability to handle multiple projects and deadlines simultaneously Preferred Qualifications Experience in handling HVAC or Construction/Infrastructure project accounts Familiarity with project-based costing systems and contractor accounting Exposure to internal control audits and working with CA firms
As a Maintenance Manager at Sigma Airtech Engineers Pvt. Ltd., your role is crucial in overseeing maintenance activities for industrial HVAC systems across various project or plant locations. Your main focus will be on ensuring system uptime, preventive maintenance, safety, and reliability. You will be responsible for managing a team of HVAC technicians and engineers, coordinating with vendors and contractors, and ensuring the optimal functioning of air-conditioning and ventilation systems in high-value industrial and institutional setups. Key Responsibilities: - Lead and manage a team of HVAC maintenance technicians and engineers across multiple sites. - Ensure peak efficiency and uptime of HVAC systems such as Chillers, VRF/VRV, AHUs, TFAs, exhaust, and ventilation systems. - Develop and implement preventive and predictive maintenance programs tailored to HVAC plant assets. - Identify and implement technical solutions for recurring HVAC breakdowns and energy inefficiencies. - Act as the point of escalation during HVAC emergencies, including BMS alerts and temperature compliance failures. - Manage AMC and warranty follow-ups with OEMs for major HVAC equipment. - Conduct regular audits and inspections to verify system performance and integrity. - Collaborate with Safety and Operations teams, drive technical training programs, and track maintenance KPIs. - Participate in energy audits, retrofitting decisions, and capital expenditure projects related to HVAC systems. - Own CMMS data entries, schedules, and maintenance histories for all HVAC assets. - Coordinate with maintenance teams at various sites to ensure standardized practices and implement cross-site improvements. Qualifications Required: - Bachelor's degree in Mechanical Engineering or related technical field. - Minimum 5 years of experience in HVAC project maintenance in industrial, commercial, or institutional facilities. - Proficiency in understanding HVAC drawings, BMS control logics, and operating sequences. Preferred Qualifications: - Experience with centralized HVAC systems, VRF/VRV systems, AHUs, TFAs, FCUs, BMS, and energy-saving retrofits. - Strong vendor negotiation and contract handling skills. - Excellent written and verbal communication skills for inter-department coordination. - Knowledge of Six Sigma, Kaizen, or Lean principles is a plus. If you are passionate about industrial HVAC systems and have the required experience and qualifications, we encourage you to apply by sending your CV to sigmaairtechhr@gmail.com. Travel across multiple plant and project sites may be required for this position. The salary offered is competitive and negotiable based on your experience. As a Maintenance Manager at Sigma Airtech Engineers Pvt. Ltd., your role is crucial in overseeing maintenance activities for industrial HVAC systems across various project or plant locations. Your main focus will be on ensuring system uptime, preventive maintenance, safety, and reliability. You will be responsible for managing a team of HVAC technicians and engineers, coordinating with vendors and contractors, and ensuring the optimal functioning of air-conditioning and ventilation systems in high-value industrial and institutional setups. Key Responsibilities: - Lead and manage a team of HVAC maintenance technicians and engineers across multiple sites. - Ensure peak efficiency and uptime of HVAC systems such as Chillers, VRF/VRV, AHUs, TFAs, exhaust, and ventilation systems. - Develop and implement preventive and predictive maintenance programs tailored to HVAC plant assets. - Identify and implement technical solutions for recurring HVAC breakdowns and energy inefficiencies. - Act as the point of escalation during HVAC emergencies, including BMS alerts and temperature compliance failures. - Manage AMC and warranty follow-ups with OEMs for major HVAC equipment. - Conduct regular audits and inspections to verify system performance and integrity. - Collaborate with Safety and Operations teams, drive technical training programs, and track maintenance KPIs. - Participate in energy audits, retrofitting decisions, and capital expenditure projects related to HVAC systems. - Own CMMS data entries, schedules, and maintenance histories for all HVAC assets. - Coordinate with maintenance teams at various sites to ensure standardized practices and implement cross-site improvements. Qualifications Required: - Bachelor's degree in Mechanical Engineering or related technical field. - Minimum 5 years of experience in HVAC project maintenance in industrial, commercial, or institutional facilities. - Proficiency in understanding HVAC drawings, BMS control logics, and operating sequences. Preferred Qualifications: - Experience with centralized HVAC systems, VRF/VRV systems, AHUs, TFAs, FCUs, BMS, and energy-saving retrofits. - Strong vendor negotiation and contract handling skills. - Excellent written and verbal communication skills for inter-department coordination. - Knowledge of Si
Job Title: HVAC Site Engineer Location: Gurgaon / Various Project Sites (as required) Experience Required: 3–6 years Industry: HVAC Project Execution – Commercial / Industrial / Institutional Projects Joining: Immediate preferred Salary: As per experience (Negotiable) Job Summary Sigma Airtech Engineers Pvt. Ltd. is seeking a skilled and dedicated HVAC Site Engineer to oversee and execute HVAC works at project sites. The candidate will be responsible for supervising installation, testing, and commissioning of HVAC systems—including VRV/VRF, Chiller Plants, Ducting, and Piping—while ensuring adherence to design, safety, quality, and project timelines. Key Responsibilities Supervise daily site HVAC activities including ducting, copper piping, insulation, and equipment installation. Execute works as per approved drawings, specifications, and project schedules. Coordinate with project managers, design teams, and subcontractors to ensure timely completion of site tasks. Conduct inspections for HVAC installations such as AHUs, TFAs, chillers, VRV/VRF systems, pumps, valves, and controls. Prepare and maintain daily progress reports, manpower logs, and material consumption records. Verify and record site measurements for contractor billing and project documentation. Coordinate with electrical, plumbing, and civil teams for smooth MEP execution and conflict resolution. Ensure implementation of site safety procedures and quality control standards. Assist in pre-commissioning and commissioning activities of HVAC systems. Review GFC drawings and suggest practical modifications based on site conditions. Monitor installation quality to ensure conformance with ASHRAE, ISHRAE, and company standards. Manage and track delivery of HVAC materials, ensuring proper storage and handling at site. Liaise with clients, consultants, and vendors for technical inspections and approvals. Required Skills & Qualifications Diploma / B.E. / B.Tech in Mechanical Engineering. 5–10 years of experience in HVAC project execution (commercial, industrial, or institutional projects). Strong knowledge of HVAC systems such as VRV/VRF, Chiller Plants, AHUs, TFAs, and exhaust systems. Ability to read and interpret HVAC, MEP, and architectural drawings. Familiarity with project documentation, installation methods, and quality standards. Good communication and coordination skills for managing site teams and vendors. Proficient in MS Office and basic AutoCAD. Self-motivated with the ability to work independently and under pressure. Why Join Us Sigma Airtech Engineers Pvt. Ltd. provides an opportunity to work on complex and high-value HVAC projects with exposure to the latest systems and technologies. You will collaborate with experienced professionals and play a key role in delivering efficient and high-quality installations.
Job Title: Sr. HVAC Draughtsman Location: Gurgaon (or project/site location as required) Experience Required: 3+ years Industry: HVAC Project Execution – Commercial / Industrial / Institutional Projects Joining: Immediate preferred Salary: As per experience (Negotiable) Job Summary Sigma Airtech Engineers Pvt. Ltd. is hiring a Senior HVAC Draughtsman to support our design and execution teams in preparing precise, coordinated HVAC drawings and documentation. The candidate will be responsible for creating detailed layouts and shop drawings for Central Chiller Plants, VRV/VRF systems, and other HVAC applications, ensuring accuracy, compliance, and constructability. Key Responsibilities Prepare detailed HVAC layout drawings for ducting, piping, equipment placement, and supports using AutoCAD. Develop shop drawings, coordination drawings, and as-built drawings in line with project requirements. Convert consultant design inputs into accurate and practical working drawings for site execution. Create detailed drawings for Chiller Plant Rooms, including chillers, pumps, cooling towers, piping, valves, and control systems. Prepare coordinated layouts for VRV/VRF systems, including refrigerant piping, drain lines, and indoor/outdoor unit layouts. Coordinate HVAC drawings with architectural, electrical, plumbing, and fire-fighting layouts to resolve service clashes. Issue Good for Construction (GFC) drawings and revise them as per site feedback or design updates. Interpret specifications, equipment data sheets, and design requirements to ensure technical compliance. Maintain drawing documentation, revision history, and version control throughout the project lifecycle. Support site teams with technical drawing clarifications and updates during execution. Required Skills & Qualifications Diploma in Mechanical Engineering or ITI Draftsmanship. 4 to 7 years of experience in HVAC drafting, preferably within EPC or contracting environments. Proficiency in AutoCAD (knowledge of Revit MEP or BIM tools is an advantage). Strong knowledge of HVAC systems, including Central Chiller Plants, VRV/VRF systems, AHUs, TFAs, and duct/piping layouts. Ability to read and interpret architectural, structural, and MEP drawings. Familiarity with standard HVAC design practices and ASHRAE/ISHRAE guidelines. Strong attention to detail, accuracy, and version control. Good communication and teamwork skills for coordination with design and site execution teams. Why Join Us At Sigma Airtech Engineers Pvt. Ltd., you will work on technically challenging HVAC projects for leading industrial, commercial, and institutional clients. We value innovation, precision, and professional growth, offering opportunities to upskill and take ownership of advanced design responsibilities.