Senior Network Engineer - Belfast

I.T. Alliance N.I. Ltd; United Kingdom; Hybrid; GBP 55,000 - 60,000; Full time

Job summary

A leading network services provider in Belfast is seeking a Senior Network Engineer to deliver and enhance enterprise network solutions. You will collaborate with teams to support innovative projects, ensuring the highest standards of service and compliance. Strong experience with Cisco and Fortinet certifications is required. This position offers a hybrid work model and competitive salary ranging from £55k to £60k based on experience.

Benefits

Car Allowance

Health Allowance

Annual Bonus (up to 10%)

22 Days Annual Leave + NI Public Holidays

Qualifications

• 5+ years experience as a Senior Network Engineer or 8+ years as a Network Engineer in enterprise/government.
• Proven capability in Cisco SDA, SNA, ISE, DNAC, ACI.
• Experience with data center switching and campus design.

Responsibilities

• Design, build, and support complex network and security solutions.
• Provide technical leadership during project delivery.
• Maintain and optimise WAN, LAN, WLAN, and data center services.

Skills

LAN/WAN/Wi-Fi networking

Commercial awareness

Solution-oriented mindset

Strong verbal and written communication

Tools

Cisco Certified Network Professional (CCNP)

Cisco Certified Security Professional (CCSP)

Fortinet certifications

Job description

Job Title: Senior Network Engineer
Location: Belfast

Hybrid - 2 days onsite per week, remainder remote. (Will on occassion involve client visits in the NI region.)

Business Area: Network & Infrastructure Services
Reporting to: Operations Manager
Type: Full-time Perm

Salary - 55 - 60k GBP neg. on experience.

Candidates must possess full working rights as sponsorship is not offered for this position.

Benefits:

Car Allowance

Health Allowance

Annual Bonus (performance based discretionary - up to 10%)

Annual Leave 22 Days + NI Public Holidays

Overview:

Our client is seeking a highly skilled and motivated Senior Network Engineer to play a leading role in delivering, supporting, and enhancing enterprise network solutions for a diverse customer base. This role is instrumental in ensuring outstanding technical service, innovative solution design, and strategic input into network infrastructure projects.

As a trusted subject matter expert, the Senior Network Engineer will oversee the full solution life cycle, from design and implementation to ongoing support, while mentoring junior team members and driving a culture of excellence and continuous improvement.

Key Responsibilities:

• Act as a trusted advisor and subject matter expert across a portfolio of enterprise and government clients.

• Design, build, and support complex network and security solutions, aligned with customer requirements and industry best practices.

• Provide technical leadership during project delivery and change implementations, including documentation, test planning, and change control compliance.

• Optimise and maintain critical LAN, WAN, WLAN, and data centre network services.

• Implement and validate robust security configurations and ensure solutions meet industry standards and compliance requirements.

• Collaborate cross-functionally with internal teams, partners, and vendors on solution development and emerging technologies.

• Support 24x7 service operations through participation in on-call rotations and effective incident management.

• Produce high-quality design, operational, and technical documentation.

• Contribute to internal tooling, process improvements, and service innovation initiatives.

• Maintain current technical certifications and industry knowledge.

• Support customer engagement efforts with clear communication and relationship-building.

Essential Skills & Experience:

• 5+ years' experience in a Senior Network Engineer role OR 8+ years as a Network Engineer in enterprise or government environments.

• Strong practical experience or valid certification in:

  • Cisco Certified Network Professional (CCNP)

  • Cisco Certified Security Professional (CCSP)

  • Fortinet certifications (FCA, FCP, FCCS, FCX)

• Proven capability in the following areas:

  • LAN/WAN/Wi-Fi networking

  • Cisco SDA, SNA, ISE, DNAC, ACI

  • Fortinet FortiGate, FortiSwitch, FortiWireless, FortiSASE

  • Network and perimeter security: Firewalls, IPS, SASE, ZTNA, UTM/UTP

  • MPLS, L2VPNs, Internet access technologies

  • Data Centre switching and campus design

• Experience working in complex, enterprise-grade IP environments.

• High level of proficiency with Microsoft Office tools, including Excel, Word, Visio, and PowerPoint.

• Strong verbal and written communication skills, with an ability to influence stakeholders.

• Commercial awareness and a solution-oriented mindset.

• Ability to work independently and within a team structure.

Desirable Skills:

• Additional certifications such as:

  • Cisco ENWLSD/ENWLSI

  • Fortinet Expert/Professional Accreditation

• Experience with:

  • SD-WAN, SD-Access

  • Scripting and automation (eg, Python, Ansible)

  • Public cloud platforms (Azure, AWS, GCP)

  • Carrier-grade network monitoring and management tools

Key Competencies & Indicators:

Technical & Business:

• Strong technical expertise and design quality

• Innovation and adaptability to change

• Focus on delivering exceptional results and customer value

Customer & People:

• Trusted relationships and customer focus

• Team collaboration and interpersonal effectiveness

• Clear communication and knowledge sharing

This role offers an exciting opportunity to shape and support enterprise-grade infrastructure for a technology-forward organisation. If you're passionate about networking, innovation, and delivering real-world impact, we want to hear from you.