Cognizant
Network Security Consultant
Warrington
Posted about 22 hours ago
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Network Security Consultant Opportunity
Excellent opportunity for Network Security Consultants to be part of our Cybersecurity Practice.
Key Responsibilities
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Operational delivery
- Administer and maintain the assigned technology areas within the estate (firewall, load balancer, proxy, NAC, MFA — assignment may span one or more depending on account staffing needs)
- Execute changes through the formal change management process; validate and test before production implementation. Resolve incidents escalated from L1/L2 within agreed SLA targets; perform root cause analysis on recurring or complex issues
- Maintain accurate configuration, change, and troubleshooting documentation to support audit and compliance requirements
- Participate in the on-call rotation and respond to P1/P2 incidents outside core hours as required
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Migration & transformation support
- Support active platform migrations and decommissions in progress across the account (hardware refreshes, platform replacements, cloud transitions)
- Execute build, test, and cutover activities under L3 direction; L3 owns the technical design and cutover governance
- Maintain rollback/parallel-run plans during transition periods and flag risk to the Team Lead
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- Continuous improvement
- Contribute to optimization initiatives (e.g., rule/policy cleanup, dependency mapping, automation of routine tasks). Feed lessons learned and recurring issues into the knowledge base and L1 runbooks
- Act as final technical escalation point across all towers, not just area of primary assignment
- Own technical design and governance for platform migrations; review and approve high-risk changes
- Coordinate cross-practice dependencies with adjacent delivery towers where scope overlaps
Technical Grounding Expected
- Firewall administration and policy management (rule-base changes, VPN tunnel troubleshooting — site-to-site and remote access)
- Load balancer operations (virtual servers, pools, health monitors)
- Proxy/web security administration, including exposure to cloud-delivered secure web gateway/RBI models
- Network access control concepts (802.1X, endpoint profiling) — vendor flexibility expected, as the NAC platform is under active review
- Identity/MFA administration, including cloud identity platforms
- Familiarity with adjacent security tooling used for correlated incidents (SIEM/XDR, privileged access management, vulnerability management, micro-segmentation)
- ITSM discipline — accurate ticket documentation, SLA awareness, change control adherence
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Explicitly Required Mindset
- Comfortable operating in a critical-infrastructure/utility environment with attendant compliance sensitivity
- Willing and able to work across multiple platforms rather than defend a single-vendor specialism — several core platforms are mid-migration or mid-decision
- Available for the 16×5 shift/on-call model, including rotational off-hours coverage for P1/P2
Certifications
- Vendor firewall/network security associate-level certification (e.g., NSE 4, CCNA/CCNP Security)
- Load balancer or proxy vendor certification where applicable to primary assignment
- ITIL Foundation
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