Security Engineer - DNS Security (Immediate Joiner)

Role & responsibilities

We are looking for a Security Engineer - DNS Security with min 5 years exp and who can be an immediate joiner. If interested, please send your resume to rekha.srikumar@locuz.com.

The design, deployment, tuning and operationalization of enterprise-grade DNS security using Cisco Umbrella, Infoblox DDI, and related tooling. This is a hands-on technical role that works across networking, cloud, SOC, and incident response teams.

• Design, deploy and manage Cisco Umbrella policies (DNS-layer protection, content filtering, secure proxy) across hybrid environments.
• Administer Infoblox DDI (DNS/DHCP/IPAM) zone management, DNSSEC, DHCP scopes, and IP address lifecycle.
• Implement DNS security controls: RPZ, DNSSEC, response rate limiting, and sinkholing workflows.
• Integrate DNS telemetry with SIEM/SOAR for detection, alerting and automated response.
• Perform threat hunting and malware/ransomware detection using DNS query patterns and threat intelligence.
• Triage and lead DNS-related security incidents — containment, root-cause analysis, remediation and post-incident reporting.
• Tune and operate DNS resilience and availability: monitoring, capacity planning, and failover testing.
• Manage change control for DDI changes — RFCs, peer reviews, and rollback procedures.
• Conduct security assessments and configuration hardening for DNS servers, resolvers and forwarders.
• Liaise with network, cloud and application teams to deploy DNS mitigations and ensure least-privilege DNS access.

Required skills & qualifications

• 5+ years in network/security engineering with demonstrable DNS experience.
• Hands-on experience with

  Cisco Umbrella

  and

  Infoblox

  (production deployments).
• Strong DNS protocol knowledge (A/AAAA/CNAME/NS/SOA, DNSSEC, TSIG, recursion, EDNS).
• Experience integrating DNS telemetry into SIEM (Splunk/QRadar/Elastic) and SOAR platforms.
• Proficiency in scripting (Python, Bash) and REST API automation.
• Bachelor’s degree in CS/IT/EE or equivalent; relevant certifications preferred

Desired qualities

• Strong cross-team communicator; translates technical DNS issues for non-technical stakeholders.
• Security-first mindset with attention to operational rigor and documentation.
• Curious and proactive — keeps up with DNS-based attack trends and emerging tooling.
• Comfortable with cloud-native DNS (Route53, Azure DNS, Cloud DNS) and hybrid architectures.

Preferred candidate profile