Lead Technical Architect - Active Uk Government Security Clearance

Appvia; Greater London; Hybrid; GBP 90,000 - 130,000; Full time

Benefits offered by this job

Flexible working hours

Hybrid working arrangement

25 days holiday + bank holidays

Birthday day off

Private healthcare

Learning budget

MacBook Pro

Dog-friendly office

Job summary

Appvia is hiring a Lead Technical Architect to lead a major Cisco SD-WAN and network transition programme within a secure public sector engagement. The role requires guiding architecture decisions, translating complex requirements into practical network designs, and presenting to governance bodies.

You will mentor other architects, work across enterprise networking and modern tech, and collaborate with cross-government teams and suppliers. Security, resilience, and timely delivery are paramount.

Qualifications

• Senior technical architect with Cisco networking fundamentals and a track record of leading complex architectures.
• Experience leading architecture decisions in regulated/public sector environments.
• Ability to translate requirements into practical network solutions and present to governance bodies.
• Experience producing architecture documentation and secure by design.

Responsibilities

• Lead technical architecture decisions across complex customer environments with a focus on Cisco networking and SD-WAN.
• Define and maintain enterprise-wide technical strategies, roadmaps, and architectures.
• Oversee design reviews and ensure security by design and governance compliance.
• Coordinate with cross-government teams and third-party suppliers for cohesive solutions.

Skills

CCNP certification

Cisco SD-WAN

Leadership

BGP

Network design

Security by design

Architectural governance

Stakeholder management

Tools

Terraform

IaC

Job description

Lead Technical Architect - Active UK Government Security Clearance Required

Location: UK - Hybrid / customer-site requirements TBC

Contract: Permanent, Full-time

About Appvia

Appvia is a specialist cloud, platform, and solutions engineering consultancy, helping organisations modernise infrastructure, improve reliability, and adopt cloud-native practices that enable long-term, sustainable delivery.

Our engineering capability spans AWS, Azure, platform engineering, networking, software, data, AI, delivery, and managed services.

We work across complex, high-impact environments in both the public and private sector, delivering solutions where security, resilience, scalability, and operational excellence are critical.

About the Role

We're hiring a Lead Technical Architect to join Appvia on a new secure public sector engagement, providing technical leadership across a major Cisco SD-WAN and network transition programme.

This is an architecture-led role for someone who can lead complex technical architecture decisions, translate complex requirements into practical network solutions, and provide assurance across design and delivery. You'll support a Principal Technical Architect in shaping technical strategy and roadmaps, and will directly support — and on occasion deputise for — the Principal Technical Architect in presenting technical designs to formal Design Authority and Security Board governance.

You’ll work across enterprise networking, wide area network design, and modern technologies, coordinating with third-party suppliers and cross-government teams to deliver cohesive, integrated solutions. You’ll also mentor and coach other architects, championing innovation and best practice as the programme evolves.

While the initial engagement has a strong Cisco networking and SD-WAN focus, you’ll also sit within Appvia’s wider cloud and platform engineering capability, with opportunities to broaden into cloud, AI, and IoT architecture across future programmes.

Interview Process - 3 Stage

• Discovery conversation with Talent Acquisition
• Technical & Architecture Interview with Engineering Team
• Final Interview with Leadership

Important

You must hold active UK Security Clearance (SC).

NPPV3 clearance is highly desirable.

Requirements

About You

You are a senior technical architect with strong Cisco networking fundamentals, a track record of leading (not just contributing to) complex technical architectures, and the credibility to operate within formal design governance.

You will bring:

• CCNP certification, or demonstrable equivalent knowledge of networking concepts, switching, routing, firewalling, and load balancing
• Cisco SD-WAN experience, including the use of BGP
• A consistent track record of leading complex technical architectures, championing innovation and best practice
• Experience working across multiple domains or projects, coordinating with third-party suppliers and cross-government teams
• Aptitude for anticipating future technologies and aligning solutions with broader strategy and business outcomes
• Expertise in delivering secure, reliable, and scalable systems within defined time and quality constraints
• Experience producing and reviewing architecture documentation and technical designs, incorporating Secure by Design principles
• Confidence operating within Technical Design Authority or architectural governance processes, including direct support for Design Authority and Security Board presentations
• Excellent stakeholder management and communication skills, translating complex technical topics for diverse audiences
• Demonstrated leadership in mentoring or coaching other architects or senior technical professionals
• Experience working in regulated, enterprise, or public sector environments
• Active UK SC clearance

Responsibilities

• Lead technical architecture decisions across complex customer environments, championing innovation and best practice
• Support the definition and maintenance of enterprise-wide technical strategies, roadmaps, and architectures
• Oversee design reviews, incorporating Secure by Design principles and compliance with architectural governance
• Coordinate with cross-government teams and third-party suppliers to ensure cohesive, integrated solutions
• Directly support the development of presentation packs for Technical Design Authority and Security Board governance, deputising for the Principal Technical Architect where required
• Drive digital innovation by evaluating emerging technologies and championing continuous improvement
• Mentor and coach other architects, fostering a culture of collaboration and technical excellence
• Facilitate the design and delivery of complex systems, ensuring performance, reliability, and security requirements are met
• Lead multiple projects, collaborating with stakeholders to address risks, budgets, and timelines
• Evaluate outcomes and integrate lessons learned into future strategies
• Provide architectural leadership across routing, connectivity, segmentation, security, and resilience
• Work closely with network engineers, platform engineers, security teams, service management, and customer architects
• Act as a trusted technical advisor to senior customer stakeholders

Technical Skills

Core technologies / experience:

• CCNP or equivalent demonstrable knowledge of networking concepts, switching, routing, and firewalling
• BGP (Border Gateway Protocol)
• Load balancing
• Enterprise routing and network architecture
• Network segmentation and security
• Architecture governance and assurance
• Technical Design Authority / Security Board experience
• Secure by Design principles
• High availability and disaster recovery

Nice to have:

• AWS or Azure cloud networking (e.g. VPC architecture, Transit Gateway, Direct Connect, Route 53, hybrid connectivity, secure landing zones, multi-account architecture)
• Cloud security architecture
• Enterprise and application integration architecture
• Infrastructure-as-code and network automation exposure
• TOGAF Foundation or BCS Enterprise and Solution Architecture certification
• Exposure to large-scale technology change programmes or complex system integrations
• NPPV3 clearance

We are a self-funded, London based startup; providing businesses with a fast and secure way to deploy containerised applications into the cloud.

We are on a mission to enable organisations to make cloud-based software delivery simple and efficient, whilst having the insights into costs, security and cadence. As a company that holds customers at the heart of everything we do, we are looking for candidates that want to make a real change to how Dev and Ops is working in the industry.

With us our customers, like the UK’s Home Office & Bank of England, are harnessing cloud-native technologies, limiting the challenges of infrastructure management and rapidly delivering digital products.

What’s on offer?

• Flexible working with core hours of 10-4pm because we know life happens outside of work
• Hybrid working - only one compulsory office day per month
• 25 days’ holiday a year, plus bank holidays
• An additional day off for your birthday
• Enhanced maternity and paternity to full pay
• Workplace Nursery Benefit to help working parents
• Full Private Healthcare cover for you with partners and children covered 50%
• Death in Service
• Cycle to Work scheme
• Electric Car Scheme
• Pension plus a salary sacrifice option for even greater savings
• Employee Assistance Programme
• Free hygiene products available in the London office
• Free therapy through AXA
• Access to the Headspace App
• Trained Mental Health First Aiders
• Learning budget of £1,000 a year
• Your own MacBook Pro while you work at Appvia
• Dog friendly office
• Wear what makes you comfortable
• Free snacks in the office
• Regular team socials, board game nights, industry meetups and more!
• Pool table & ping pong table

But don’t just take our word for it, you can check out what our Appvians say about us on Glassdoor and by following us on LinkedIn, Twitter and TikTok.

We are proud to be an equal opportunities employer and actively encourage, respect, and recognise diversity of thought and background throughout the business. All applicants will be considered for employment without attention to age, ethnicity, religion, sex, sexual orientation, gender identity, family or parental status, national origin, or veteran, neurodiversity, and disability status.

Note: While all roles are active and approved at the time of posting, the dynamic nature of our start-up means some applications may be processed to pipeline talent for future opportunities rather than current openings. We will strive to keep you informed of any changes to the status of your application.

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Lead Technical Architect - Active UK Government Security Clearance London, England, GB