Senior Network Engineer

Cooley LLP; City of London; On-site; GBP 60,000 - 80,000; Full time

Job summary

A leading law firm in London seeks a Senior Network Engineer to design and implement high-density enterprise wireless networks. The role involves engineering LAN/WAN environments, monitoring performance, and providing technical support. Candidates should have at least 5 years of experience with Aruba and Cisco technologies, along with strong knowledge of routing protocols. This position offers an inclusive environment and opportunities for career advancement.

Qualifications

• Minimum of 5 years’ experience in wireless network design and implementation.
• Expertise in Aruba technologies, including WLAN controllers.
• Hands-on experience with Cisco routing and SD-WAN platforms.

Responsibilities

• Engineer and support the Firm’s LAN, WAN, and SD-WAN environments.
• Monitor and analyze wireless infrastructure health.
• Coordinate installation of Aruba wireless infrastructure.

Skills

High-density enterprise wireless network design

Aruba wireless technologies

Cisco switching and routing

Routing protocols (BGP, EIGRP, OSPF)

Firewall concepts

Education

Degree in engineering or computer science

Tools

Aruba hardware/software

Cisco hardware/software

Job description

Apply for the Senior Network Engineer role at Cooley LLP.

Position Summary

Cooley Information Services (IS) embraces a culture of customer service excellence and expects all members to move this agenda forward. As part of the IS Communications Systems group, the Senior Network Engineer is responsible for the Firm’s WLAN, LAN and WAN environments. The role is a technical expert who executes network infrastructure projects, works closely with the Architecture and Engineering group and the Network Operations group, mentors junior engineers, and provides third‑level support for complex issues.

Primary Position Responsibilities

• Engineer, configure and support the Firm’s LAN, WAN and SD‑WAN environments with a focus on enterprise wireless infrastructure.
• Analyse wireless survey data for new implementations and improve existing ones.
• Coordinate installation and upgrades of Aruba wireless infrastructure firm‑wide.
• Monitor wireless infrastructure health and statistics using Aruba Airwave and other tools.
• Research emerging network technologies and recommend them based on future business needs.
• Monitor network performance and integrity.
• Troubleshoot and manage issues of Firm network infrastructure.
• Perform network maintenance, upgrades and refreshes.
• Assist with regional office build‑outs and upgrades.
• Assist with network access controls in alignment with the Security team.
• Help the Network Operations team implement required hardware in data centers and office locations.
• Identify problem areas and proactively develop solutions to meet network infrastructure challenges.
• Monitor, measure and analyse data and trends against performance and security SLAs.
• Coordinate with and participate in activities with vendors as required.
• Participate in planning, testing and execution of DR/BC procedures, including fail‑over and fail‑back between data centers and across the Firm’s network.
• Mentor junior engineers and develop “how‑to” guides under the direction of the manager or consultant.
• Provide day‑to‑day technical support of the network at the Firm’s data centers and office premises, ensuring high efficiency in problem resolution and uptime.
• Provide on‑call support to remedy equipment failures by working with NetOps, Facilities and service providers at Firm office locations and data centers.
• Produce clear, grammatically correct documentation, emails, procedures and status reports.
• Comply with all department policies, standards and procedures.

Additional Position Responsibilities

• Assist with the deployment and support of systems infrastructure.
• Participate in Change Control and Change Management.
• Respond to administrative requests and responsibilities in a timely manner.
• Assist Management with administrative tasks and vendor management.
• Exercise care to prevent injuries to oneself and co‑workers.
• Perform all other duties as assigned or required.

Skills & Experience

Required

• Minimum of 5 years’ experience designing and implementing high‑density enterprise wireless networks.
• Expertise with Aruba wireless technologies, including virtual and physical WLAN controllers, Mobility Master and Airwave.
• Hands‑on experience with Cisco switching, routing and SD‑WAN platforms.
• Strong knowledge of routing protocols including BGP, EIGRP and OSPF.
• Strong knowledge of firewall concepts.
• Ability to travel to other offices as needed.
• Ability to work extended and/or weekend hours, as required.
• Proficiency in the Firm’s mainstream business applications following new‑hire orientation.

Preferred

• Experience with Palo Alto Networks firewalls.
• Educated to degree level, preferably in engineering or computer science.
• Aruba and/or Cisco certification.
• Prior law firm experience.

Competencies

• Professional demeanor at all times, including during project engagement.
• Excellent verbal and written communication skills.
• Strong teamwork and ability to interact with staff at all levels.
• Strong analytical and project management skills; ability to interpret and apply complex technical information.
• Independent judgment and ability to determine when further expertise is needed.
• Ability to work effectively under pressure, set priorities and handle multiple matters concurrently.
• Ability to manage, counsel and supervise others, including contractors and vendors.
• High organisational skills to manage projects, monitor live systems, identify trends and maintain accurate records.

Reporting to this position

No direct reports.

Equal Opportunity Statement

We strive to create an inclusive and rewarding environment that allows our people to thrive both professionally and personally. In order to provide equal employment and advancement opportunities to all individuals, employment decisions at the Firm will be based on merit, qualifications and abilities. The Firm does not discriminate on the basis of age, disability, gender reassignment, marriage and civil partnership, pregnancy and maternity, race, religion or belief, sex, sexual orientation, or any other protected characteristic. This policy governs all aspects of employment, including but not limited to recruitment, selection, job assignment, compensation, discipline, promotion, termination and access to benefits and training. Cooley (UK) LLP is dedicated to making our recruitment practices and candidate interviews inclusive and accessible for everyone. If you have a medical condition, disability or are neurodivergent and require reasonable accommodations, adjustments or support during your interview process, please contact [e-mail]. We assure you that all requests will be treated with sensitivity and strict confidentiality, and they will not affect your potential employment with Cooley (UK) LLP.