Senior Network Engineer

OneAdvanced Limited; York and North Yorkshire; On-site; GBP 70,000 - 100,000; Full time

Benefits offered by this job

26 days’ holiday + bank holidays

Private medical insurance

Pension with 5% matched

Life assurance

Volunteer day

Employee Assistance Programme

Job summary

OneAdvanced is seeking a Senior Network Engineer to work with a customer-centric squad, delivering network and security solutions across on-prem, cloud and hybrid environments.

You will design, implement and govern complex networks, mentoring peers and collaborating with customer stakeholders to drive technical direction.

Qualifications

• Experience at CCNP/CCIE level or equivalent in design and configuration.
• Strong knowledge of on-premise, cloud and hybrid networks.
• Ability to deliver high-quality technical documents and designs.

Responsibilities

• Plan, design and implement for customer sites, data centres and Azure cloud.
• Collaborate with project managers, architects and team members to develop solutions.
• Provide technical input, governance and drive investigations to resolution.
• Document high/low level designs for the audience.
• Travel to customer datacentres and sites as required (expenses covered).
• Mentor other engineers and contribute to wider technical support teams.

Skills

CCNP/CCIE level

Cisco ASA/Firepower

Fortigate firewalls

Nexus/Catalyst switches

Azure networking

Meraki

Network & Security fundamentals

Technical documentation

Mentoring & leadership

Project governance & management

Stakeholder communication

Tools

Azure networking

Meraki

Job description

Join OneAdvanced

The Senior Network Engineer will work as part of a customer centric squad providing project technical resources alongside a multi-disciplined team. Working to scope and deliver solutions alongside the customer architectural team.

You will be comfortable working at CCNP or CCIE level or have the equivalent experience in designing and configuring network and security technologies, covering on-premise, cloud and hybrid network solutions. You will be experienced in delivering technical projects and defining technical direction.

Communication and collaboration are paramount in this role, you will work closely with a variety of internal and external business stakeholders and will be continually engaged and collaborating.

What You Will Do

• Responsibilities include planning, design and implementation for customer site, datacentre and Azure cloud. You will produce customer-facing high quality HLD and LLD documentation.
• Working with customer project managers, architecture and other team members to develop technical solutions.
• Where required, provide technical support and early life support, and take ownership of technical investigations into complex problems, continuing to work on them until a resolution or workaround can be implemented.
• Provide technical input and governance to the problem and update stakeholders at regular intervals as the technical investigation continues.
• Attend relevant customer specific meetings as and where required. Examples may include presenting changes to the change advisory board, providing technical input into low level designs.
• Ensure compliance to relevant standards (i.e. ISO 27001, 9001) and security (i.e. CIS, STIG) to help ensure we control, report and adequately measure and handle risks the customer faces.
• As an effective and highly capable team member, you will self-manage your workload. You will also need to be able to mentor and develop other engineers in the wider technical support teams.
• Author new technical documentation, for example, for new solutions or changes in configuration required to adhere to updated security standards that is structured and relevant to the audience.
• Travel to customer datacentre and customer sites as required (expenses covered).
• Work on other tasks as required to support wider business plans and initiatives.

What You Will Have

• Experience with Cisco ASA, Firepower and Fortigate firewalls, also Nexus and Catalyst switches.
• Experience with Azure networking solutions and integration with traditional WAN/LAN configuration.
• Strong understanding of bothNetwork and Security principlesincluding routing and switching protocols, fabric infrastructure, storage networking.
• Exposure to Cisco Wireless LAN solutions, particularly Meraki.
• In-depth knowledge of network security best practices.
• Be self-motivated, tenacious, disciplined, enthusiastic and resilient
• Excellent communication verbal and written, being able to operate at all levels and articulate messages to a variety of different audiences. Understand people and cultural differences to build good relationships with colleagues.
• Have excellent problem-solving skills and be able to devise and implement strategies beneficial to Advanced and our client.
• Capability to author and update infrastructure, support and proceduraldocumentation.
• Keen willingness tomentor othersin the team and wider department on technologies within your field of expertise.
• Capability to project manage in an informal capacity; able to apply appropriate project methodology to plan, execute and report on work in a structured way, with effective time management skills.
• Ability to multitask and prioritise under pressure

Please note, applicants must have the legal right to work in the UK at the time of application.

What We Do For You

Wellbeing that means something

• 26 days’ holiday + bank holidays (and the option to buy more) plus 1 paid volunteering day every year
• Exceptional family leave, 26 weeks fully paid maternity/adoption, 4 weeks fully paid paternity, 22 weeks fully paid shared parental leave, plus 5 days paid bereavement leave
• Robust sick pay of up to 13 weeks full pay + 13 weeks half pay
• 24/7 Employee Assistance Programme for confidential support
• Private medical insurance for everyone, no medical-history exclusions

Financial benefits that have your back

• Performance-based rewards tailored to your role, from company-wide bonuses to OTE and commission structures
• Income protection: up to 75% salary for 5 years if you ever need it
• Pension with 5% matched company contributions
• Life assurance worth 4x your salary from day one
• Free financial planning session with the option to engage in more tailored financial coaching.

Grow your career with us

• SkillsHub learning platform with leadership pathways, future-manager training, and a huge online library
• Access to external training and apprenticeships

Making a Difference

• MatchIt! Fundraise for a cause close to your heart and OneAdvanced will match part of the funding
• Pennies from Heaven donate the pennies from your pay check to help make a difference without lifting a finger

Plus plenty other flexible benefits to suit your lifestyle on our RewardHub, including:

• ULEV car scheme with 1,000+ models
• Dental insurance, Health Cash Plan, Critical Illness Cover, Partner Life Cover, Health Assessment, Gym Membership

Who We Are

At OneAdvanced, we are at the forefront of delivering sector-focused technology solutions that simplify complexity, drive meaningful progress, and help build a fairer, more inclusive society.

We’re much more than a software company. We deliver SaaS workflow applications and IT services that power organisations across Education, Government, Healthcare, Legal, Manufacturing, Housing, Retail, and more.

OneAdvanced is one of the UK’s largest business software and services companies. Based in Birmingham (The Mailbox), operating across the UK, Ireland, India, and Australia.

Our secure, scalable platform, including OneAdvanced AI, our private AI service for UK organisations, powers connectivity and innovation across critical sectors. Alongside our software are our IT services, including hosting, managed services, and application modernisation.

We strive to create an inclusive workplace that drives innovation and collaboration, championing diverse perspectives and ideas. Our Environmental, Social and Governance (ESG) strategy is embedded in everything we do, guiding us to create meaningful impact for our people, our customers and the planet.

Proud to be recognised in the Financial Times’ Best Employers 2026 list for the second-year running, an independent and data led ranking based on employee feedback. Join us and become part of a team that’s powering the world of work and making a real difference.

Join us and become part of a team that’s powering the world of work and making a real difference.

Learn more at www.oneadvanced.com