Senior Network Engineer (CCNP)

CACI Ltd; Greater London; On-site; GBP 60,000 - 90,000; Full time

Job summary

CACI Ltd in London is seeking a Senior Network Engineer to join the UK Deployment Team. You will plan, design and deploy LAN/WAN networks for demanding clients, delivering changes with care and precision.

The role requires CCNP certification, deep Cisco expertise, and the ability to manage several projects concurrently while maintaining high availability and customer satisfaction. You will document diagrams, support change control, and mentor junior engineers.

Qualifications

• In-depth knowledge of Cisco Routing & Switching.
• CCNP certified.
• Experience designing medium to large enterprise networks.
• Ability to manage multiple projects concurrently.
• Strong customer-facing skills.

Responsibilities

• Plan, manage and deploy technology changes to support DC services.
• Create implementation plans for RFCs with detailed verification.
• Document network diagrams to a high standard.
• Peer review and validation of deployment plans.
• Ensure uptime and stability of essential services.

Skills

Cisco Routing & Switching

CCNP certified

BGP/OSPF

LAN/WAN design

VLAN trunking & EtherChannel

Layer 2 topology & STP

Hybrid DC connectivity

Project coordination

Customer facing

Networking principles

Job description

From our headquarters in London, we’re busy empowering organisations to make bold, strategic moves with the power of data and technology. Founded in 1975, our operations take place from multiple offices across the UK, Europe and India with over 1600 full‑time employees and an annual turnover of £179m.

Our expertise spans industries, from retail and education to public sector and transport – delivering intelligent solutions that drive progress and create measurable impact. Whether it’s business intelligence, customer marketing, cloud infrastructure, cybersecurity, critical national infrastructure or data management, our approach is never one‑size‑fits‑all.

We don’t just deliver solutions; we build for the tomorrow’s world, all while fostering a culture that allows employees to be their authentic selves and succeed in their careers.

About Network Services

CACI Network Services is a rapidly expanding specialist IT and Networks consultancy offering a wide variety of opportunities to work within challenging and exciting environments with our major clients in Global Media, Banking, Government, Telecoms & Utilities.

The role

A Senior Network Engineer is required to join the UK Deployment Team, responsible for the deployment and planning of our customers network infrastructure.

The team is responsible for the delivery and deployment of network/security projects and requests to enhance the client’s infrastructure to meet current and future business demands.

Key responsibilities

Plan, manage and deploy technology changes to support DC services

• Deploy LAN infrastructure to support end user services requirements
• Includes patching schedules for facilities to cable network equipment
• Diagrams for Network Operations
• Inventory management

Create implementation plans for RFC’s to a high level of detail.

• Correctly document pre and post checks for change verification purposes
• Understand and document back out plans, clearly identifying back out points.
• Identify points of no return

Support the stability and uptime of essential services by planning changes with a documented best approach mind set.

• Identify where changes can be complete with zero downtime to hosted services.
• Plan and implement changes with a cost effective resource strategy.

Identify, understand and document change risks and mitigation tactics.

• Identify, understand and document impact of planned technology changes, including documentation expected output from verification.

Document network estate for Operation Support and to support change planning

• Complete network diagrams to a high standard.

Peer review and validation of technical deployment plans

• Provide constructive feedback to peers to support change control requirement and maintain high standards of detail and quality offered by CACI.

Core skills, knowledge and experience required

• In-depth knowledge of Cisco Routing & Switching.
• CCNP certified
• Proficient with multiple routing methods, route summarization.
• Designs medium enterprise routing domains.
• Experience in configuring VLAN trunking, EtherChannel, Layer 2 redundancy.
• Designs Layer 2 topology to avoid loops, tuning STP for large networks.
• Designs medium to large enterprise switching networks.
• Ability to handle numerous separate projects concurrently
• Ability to work under pressure and to tight deadlines whilst maintaining attention to detail.
• Able to implement BGP policies, communities, route maps.
• Analyse, review and understand network topologies.
• Experience in designing rack layouts, structured cabling for medium DCs.
• Able to implement BGP/OSPF within data centres.
• Designs hybrid DC connectivity (MPLS, Direct Connect, ExpressRoute).
• Coordinate multiple projects, change management and governance efficiently working both independently and as a member of a team.
• Good understanding of networking principles.
• Good customer facing skills with the ability to keep the customer informed at all times and understand their requirements

Desirable skills (not essential)

• Experience with Cisco ACI
• Experience with EVPN
• Load Balancing Experience (F5)

Equal opportunities

CACI is proud to be an equal employer. Embracing the diversity of our people, we are on a journey to build a truly inclusive work environment where no one is treated less favourably due to ethnic origin, age, gender, veteran status, religion or belief, sexual orientation, marital status, and disability or health condition, actively working to prevent discrimination.

As a Disability Confident employer, we will:

• Provide reasonable adjustments in the recruitment process where requested (contact a member of the recruitment team on 020 7602 6000 to discuss individual requirements further).
• Offer people with health conditions and disabilities, meeting the minimum criteria for a role, an interview.

Our people are unique, and we encourage, and support them, to be confident in contributing to our inclusion journey.