Senior Network Engineer

Abacus Group

. Manage performance and availability of Abacus datacentre networks across the US and UK .

Posted 10/2/2026full-timeRemote • United KingdomSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in managing and optimizing datacentre networks, including proficiency in deploying and supporting Juniper and Cisco hardware. Strong capabilities in troubleshooting, network design, and leading technical projects while maintaining high availability and performance across multiple environments.

Highest-signal resume keywords

Juniper Hardware ManagementCisco Hardware ManagementNGFW Solutions SupportNetwork Design and ImplementationClient Engagement Leadership

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

OSPFBGPDIAVPNTCP/IPLAN/WAN TroubleshootingNetwork MonitoringVirtualizationDocumentationMulti-Tenant MSP Experience

Soft Skills

Interpersonal SkillsCommunication SkillsTeam CollaborationMentoring

Tools & Technologies

Juniper SRXJuniper EXCisco ISRCisco ASRCisco NexusCisco CatalystPalo Alto NGFWFortiNet NGFWAzureVMware

Certifications & Qualifications

CCNPJNCIP

Industry Keywords

Datacentre NetworksNetwork Backbone InfrastructureClient Network BuildsHigh AvailabilityPerformance Monitoring

Tech Stack

Tools & technologies

AWSAzureCitrixCloudDNSTCP/IPVMware

About the role

Key responsibilities & impact

Manage performance and availability of Abacus datacentre networks across the US and UK
Participate in network improvement projects
Maintain high availability and performance for datacentre services
Act as an escalation point for support incidents affecting multiple clients
Serve as technical lead for internal and client projects, including client network builds
Diagnose and resolve complex issues and proactively identify improvement opportunities
Support and maintain network backbone infrastructure across multiple datacenters and geographic regions using OSPF, BGP, DIA, PTP, VPN, multi-gig connectivity, and cross-connects
Lead medium-sized client engagements involving equipment deployment, network design, or refresh tasks
Provide escalation support for client offices, Abacus datacenters, Azure and AWS public cloud networks, and remote access systems such as VPN and Citrix
Support and maintain NGFW firewall configurations and troubleshoot datacenter and client environments
Work directly with high-profile clients to deliver suitable solutions and resolve problems effectively
Collaborate with internal Abacus teams to provide solutions and escalation support
Create and maintain documentation for Abacus and client infrastructure, processes, and procedures
Monitor technology trends and recommend solutions to improve performance, security, and efficiency
Provide guidance and mentoring to team members

Requirements

What you’ll need

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
Thorough understanding of the OSI network model, Ethernet, and TCP/IP networking concepts
Excellent LAN/WAN fault diagnostic and troubleshooting skills
In-depth knowledge of Spanning Tree, TCP/IP, DHCP, DNS, BGP, OSPF, VPN, IPSEC, QoS, NATs, and ACLs
Experience managing datacentre networks, preferably in a multi-tenant MSP environment
Experience with office network design, implementation, monitoring, and troubleshooting
Experience leading client engagements
Expertise leading technical projects from start to finish, including requirements gathering, 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
Strong documentation, interpersonal, and communication skills
Willingness to learn new technologies and maintain industry knowledge
Ability to work collaboratively in a team environment
8+ years of networking experience
CCNP, JNCIP, or equivalent certification preferred
Bachelor’s degree a plus
MSP experience a plus
Flexibility for after-hours and weekend work
Ability to work an on-call rotation
Ability to work the 8/8:30am–5/5:30pm shift

Benefits

Comp & perks

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