Senior Network Engineer (DV Security Clearance)
Join CGI in this Senior Network Engineer role. This position requires a DV Security Clearance and is integral to safeguarding and advancing networks powering our clients’ critical missions.
Position Description
As a Senior Network Engineer at CGI, you will play a pivotal role in safeguarding and advancing the networks that power our clients’ most critical missions.
You will help shape resilient, secure, and scalable infrastructure while contributing to innovative integration and design projects that drive industry transformation.
This role offers the chance to take meaningful ownership of complex challenges, collaborate with expert teams, and apply your creativity to deliver future‑ready network solutions.
Supported by CGI’s strong engineering community, you’ll make a lasting impact across high‑value programmes while continuously growing your skills.
CGI was recognised in the Sunday Times Best Places to Work List 2025 and has been named a UK ‘Best Employer’ by the Financial Times.
We offer a competitive salary, excellent pension, private healthcare, and a share scheme (3.5% + 3.5% matching) which makes you a CGI Partner, not just an employee.
We are committed to inclusivity, building a genuinely diverse community of tech talent and inspiring everyone to pursue careers in our sector, including our Armed Forces, and are proud to hold a Gold Award in recognition of our support of the Armed Forces Corporate Covenant.
Due to the secure nature of the programme, you will need to hold UK Security Clearance or be eligible to go through this clearance.
Key Responsibilities
* Provide advanced support and troubleshooting across Dell OS10, Sonic, Cisco, Palo Alto, and NSX-T technologies.
* Contribute to network integration, solution design, and scalable infrastructure enhancements.
* Manage BGP, VPN, spine-and-leaf architectures, and data centre patching to maintain high performance.
* Oversee IPAM and DNS, optimise load-balancing solutions, particularly F5.
* Support InfoBlox deployments and align network operations with wider infrastructure strategies.
* Mentor junior engineers and strengthen cross-team engagement.
* Participate in the on-call rota to ensure fast, effective resolution of critical incidents.
Required Qualifications To Be Successful In This Role
To excel in this role, you should bring strong technical depth in enterprise and defence‑grade networks, combined with the ability to troubleshoot, design, and integrate complex solutions.
You should be confident working in high-availability environments and comfortable collaborating across teams to deliver secure, high-impact outcomes.
Essential Qualifications
* Proven experience in a senior network engineering role.
* Strong background in defence environments.
* Expertise with Dell OS10, Sonic, Cisco networking, Palo Alto firewalls, and NSX-T.
* Deep understanding of spine-and-leaf architecture, BGP, VPNs, and data centre patching.
* Strong knowledge of DNS, IPAM, load balancing; F5 and InfoBlox experience highly desirable.
* Excellent analytical, troubleshooting, and communication skills.
Desired Qualifications
* Understanding of cross-domain technologies (Tiger Traps, Garrison, OpsWat, NiFi).
* Familiarity with VMware infrastructure and Elastic monitoring.
Life at CGI
Life at CGI is rooted in ownership, teamwork, respect and belonging. You’ll reach your full potential because you’re invited to be an owner from day 1 and we call ourselves CGI Partners rather than employees.
Your work creates value. You’ll develop innovative solutions and build relationships with teammates and clients while accessing global capabilities.
You’ll shape your career by joining a company built to grow and last, supported by leaders who care about your health and well‑being and provide opportunities to deepen your skills and broaden your horizons.
Come join our team—one of the largest IT and business consulting services firms in the world.
Seniority level
Entry level
Employment type
Full‑time
Job function
Information Technology
Industries
IT Services and IT Consulting
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