Freelance Linux/Cloud Infrastructure Engineer (Remote)

Company Description

ThreatXIntel is a startup cyber security company focused on protecting businesses and organizations from cyber threats. Our team of seasoned professionals provides a range of services including cloud security, web and mobile security testing, cloud security assessment, and DevSecOps. We are driven to offer personalized, affordable solutions that cater to the unique needs of our clients. By taking a proactive approach to security, we continually monitor and test digital environments to identify vulnerabilities before they can be exploited. Our mission is to deliver exceptional cyber security services to give our clients peace of mind, enabling them to concentrate on growing their business.

Linux/Cloud Infrastructure Engineer

Key Responsibilities

• Maintain, patch, and secure Linux (primarily Red Hat) and Windows systems.
• Ensure compliance with

  NIST 800-53

  , customer-specific baselines, and

  CIS benchmarks

  .
• Manage Oracle Cloud Infrastructure (OCI) services, including networking, compute, and storage.
• Automate provisioning, configuration, and compliance using

  Terraform

  and

  Ansible

  .
• Build and maintain CI/CD pipelines for customer self-service deployments.
• Identify, analyze, and remediate vulnerabilities across OS and applications.
• Support operational work beyond core Linux/OCI functions (flexibility required).
• Collaborate with customers and internal teams on design, architecture, and security initiatives.
• Develop scripts and automation (Bash, Python, PowerShell).
• Document compliance checks, operational procedures, and automation workflows.
  

Required Skills & Experience

• 5+ years as a Linux Systems Engineer (Red Hat preferred).
• Strong Windows administration and security baseline knowledge.
• Hands-on experience with

  Oracle Cloud Infrastructure (OCI)

  services.
• Proficiency with

  Terraform (must-have)

  and Ansible.
• Solid understanding of

  NIST 800-53, CIS benchmarks, and compliance frameworks

  .
• Experience in

  vulnerability scanning and remediation

  (Tenable, Qualys a plus).
• Familiarity with

  CI/CD pipelines and DevOps practices

  .
• Scripting skills (Bash, Python, or PowerShell).
• Strong troubleshooting across OS, cloud, and networking layers.
  

Nice-to-Have Skills

• Knowledge of OCI DevOps services and pipelines.
• Familiarity with hardening tools and enterprise vulnerability scanners.
• Networking (DNS, VPN, Firewalls, Load Balancers).
• Experience with multi-cloud/hybrid (AWS/Azure/GCP).
  

Soft Skills

• Adaptability – ability to wear multiple hats (operations, security, DevOps, architecture).
• Strong communication skills for customer and team interactions.
• Team-oriented mindset, with willingness to expand technical horizons.