Senior Network Engineer

Abacus; United States; On-site; GBP 65,000 - 90,000; Full time

Benefits offered by this job

Annual leave

Gym discount

Life insurance

Travel insurance

Well-being support

Competitive pay

Pension scheme

Company events

Private medical & dental

Job summary

Abacus is seeking a Senior Network Engineer to manage datacentre networks across the US and UK, using Cisco, Juniper, and next‑gen firewall technologies, ensuring high availability and performance. You will lead client projects, provide escalation support, mentor team members, and contribute to documentation and improvement initiatives.

Collaboration with Abacus teams will be essential to deliver seamless solutions.

Qualifications

• 8+ years of networking experience.

Responsibilities

• Diagnose and resolve complex issues quickly and propose improvements.
• Support and maintain network backbone infrastructure across datacenters and regions.
• Lead medium-sized client engagements involving deployment, design, or refresh tasks.
• Provide escalation support for incidents affecting multiple clients and environments.
• Mentor and guide team members to develop their skills.
• Create and maintain documentation for infrastructure, processes, and procedures.
• Stay up-to-date with trends to improve performance and security.

Skills

Cisco hardware

Juniper hardware

NGFW expertise

Networking concepts

LAN/WAN troubleshooting

BGP/OSPF

NAT/ACLs

Datacentre networking

Documentation skills

VMware integration

Education

CCNP or equivalent

JNCIP or equivalent

Bachelor's degree (preferred)

Tools

Azure networking

AWS networking

Network monitoring tools

Job description

Job Summary

As a Senior Network Engineer, you will bring your expertise with Cisco, Juniper, and next generation firewall technologies to the position. You will manage performance and availability of Abacus datacentre networks across the US and UK and participate in improvement projects. You will be part of a team tasked with maintaining a very level of availability and performance for datacentre services. You will also be a point of escalation for support incidents that affect multiple clients. Further, you will serve as a technical lead for internal and client projects, participating in client network builds.

Job Summary

As a Senior Network Engineer, you will bring your expertise with Cisco, Juniper, and next generation firewall technologies to the position. You will manage performance and availability of Abacus datacentre networks across the US and UK and participate in improvement projects. You will be part of a team tasked with maintaining a very level of availability and performance for datacentre services. You will also be a point of escalation for support incidents that affect multiple clients. Further, you will serve as a technical lead for internal and client projects, participating in client network builds.

Responsibilities

• Diagnose and resolve complex issues quickly, proactively identify areas for improvement, and recommend solutions.
• Support and maintain network backbone infrastructure involving multiple datacenters and geographic regions based on dynamic routing protocols (OSPF, BGP), and various mediums (DIA, PTP, VPN, multi-gig connectivity,
• cross-connects)
• Work independently to lead medium sized client engagements involving equipment deployment, network design, or refresh tasks.
• Provide escalation support for incidents involving client offices, Abacus datacenters, public cloud networks (Azure and AWS), and remote access (VPN, Citrix, etc.).
• Support and maintain NGFW firewall configurations with the ability to troubleshoot datacenter and client environments.
• Work directly with high profile clients to provide solutions that meet their needs, and account for critical dependencies to ensure seamless and effective resolution to problems.
• Maintain a high level of communication and collaboration with internal Abacus teams to provide solutions and escalation support.
• Create and maintain comprehensive documentation for Abacus and client infrastructure, processes, and procedures.
• Stay abreast of the latest technological trends and recommend solutions to improve performance, security, and efficiency.
• Provide guidance and mentoring to other team members to develop their skills.

Skills

• Strong experience deploying and managing Juniper hardware including SRX and EX platforms.
• Strong experience deploying and managing Cisco hardware including ISR, ASR, Nexus, and Catalyst platforms.
• Strong experience supporting NGFW solutions from Palo Alto, FortiNet, and Cisco.
• A thorough understanding of the OSI network model, Ethernet, and TCP/IP networking concepts.
• Excellent LAN/WAN fault diagnostic and troubleshooting skills, including in-depth knowledge of Spanning Tree,
• TCP/IP, DHCP, DNS, BGP, OSPF, VPN, IPSEC, QoS, NATs and ACLs.
• Experience managing datacentre networks, preferrable in a multi-tenant MSP environment. Ability to maintain network performance, identify issues and recommend solutions.
• Experience with office network design, implementation, monitoring, and troubleshooting.
• Experience leading client engagements with an ability to suggest innovative solutions.
• Expertise leading technical projects from start to finish, ensuring they are completed on time, and to the client’s satisfaction including gathering requirements, planning, execution and post-implementation review.
• Experience with network monitoring platforms
• Solid understanding of virtualization and network integration with VMware infrastructure.
• Experience maintaining network solutions based on Azure’s platform preferred.
• Flexible and able to adapt to changing priorities and project requirements. Ability to effectively prioritize when faced with multiple tasks.
• Strong and detailed documentation, interpersonal, and communications skills.
• Willingness to learn new technologies and maintain industry knowledge.Ability to work with and be a part of collaborative team environment.

Qualifications

• 8 + years of Networking experience
• CCNP, JNCIP or equivalent certification preferred
• Bachelors degree a plus
• MSP experience a plus
• Flexibility for after hours and weekend work
• Ability to work on call rotation
• Ability to work 8/8.30am - 5/5.30pm shift.

The Benefits Package Consists Of

• Generous annual leave entitlement plus bank holidays (pro-rata if part-time working hours apply)
• Gym discount
• Life insurance
• Comprehensive travel insurance for you and your family in line with scheme rules
• Confidential well-being and counselling support
• Competitive Compensation
• Contributory pension scheme
• Company events
• Private Medical and Dental Insurance