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(SC cleared) Senior Network Architect - Cisco

Methods
Bristol, GBR
Full-time
Senior
Remote
GBP 70000-80000 / year
Discovered 1 weeks ago
Communication

Full Job Posting

What you will do:

  • Review the live network implementation, configurations and legacy design material across both data centres, identifying gaps between documented and actual operation.
  • Produce accurate current-state High Level Designs and Low Level Designs using company templates, supported by clear topology diagrams, connectivity flows and technical dependencies.
  • Review Cisco ACI, routing, firewall and load-balancing arrangements with the Architecture and Network support teams to understand service connectivity and operational constraints.
  • Produce a Network Review and Recommendation Report identifying practical improvements that can be made without significant redesign and with minimal risk to live services.
  • Assess opportunities to make better use of Cisco ACI application-centric capabilities, including application relationships, segmentation and policy design.
  • Present recommended improvements as a prioritised roadmap showing sequencing, interdependencies, implementation considerations and service impact.
  • Produce a Network Disaster Recovery Capability Report assessing the changes required for true active/active connectivity between the two data centres.
  • Explain current connectivity limitations, proposed implementation approaches, risks to existing services and any additional hardware, software or licensing requirements.
  • Lead technical review discussions, resolve design comments and secure review and sign-off of design documentation from Architecture and Network teams.
  • Maintain controlled technical documentation and supporting evidence, contribute to risk and issue reporting, and submit deliverables through agreed secure channels.

Requirements

  • Strong enterprise network architecture experience, including assessing existing implementations and producing accurate High Level Designs and Low Level Designs.
  • Hands-on Cisco ACI experience, including fabric architecture, tenants, VRFs, bridge domains, endpoint groups and contracts, with an understanding of application-centric policy design.
  • Strong Cisco routing knowledge and practical understanding of IP addressing, routing protocols, segmentation and connectivity between data centres.
  • Experience reviewing Cisco ASA firewall configurations, traffic flows, access policies, NAT and high-availability arrangements.
  • Experience with F5 load balancers, including traffic management, health monitoring, resilience and dependencies on surrounding network services.
  • Experience assessing network disaster recovery and active/active designs, including failure scenarios, failover behaviour, routing symmetry and stateful service dependencies.
  • Ability to investigate live configurations safely, identify technical constraints and recommend proportionate changes with clear implementation and operational impacts.
  • Strong technical writing, diagramming and stakeholder communication skills, with experience taking designs through formal review and approval.
  • Desirable experience
  • Cisco ACI deployments spanning multiple data centres and migration towards application-centric policies.
  • Cisco Certified Network Associate (CCNA)
  • Network resilience testing, recovery planning and assessment of hardware, software and licensing options.
  • Defence, government or other regulated environments with controlled technical data and formal configuration management.
  • Relevant Cisco, F5 or network architecture certifications, such as CCNP or CCIE.

Benefits

  • By joining us you can expect
  • Autonomy to develop and grow your skills and experience
  • Be part of exciting project work that is making a difference in society
  • Strong, inspiring and thought-provoking leadership
  • A supportive and collaborative environment
  • As well as this, we offer:
  • Development access to LinkedIn Learning, a management development programme and training
  • Wellness 24/7 Confidential employee assistance programme
  • Social - Breakfast Tuesdays, Thirsty Thursdays and Pizza on the last Thursday of each month as well as commitment to charitable causes
  • Time off 25 days a year; plus the opportunity to purchase extra leave per year
  • Pension Salary Exchange Scheme with 4% employer contribution and 5% employee contribution
  • Life Assurance of 4 times base salary
  • Private Medical Insurance which is non-contributory (spouse and dependants included)
  • Worldwide Travel Insurance which is non-contributory (spouse and dependants included)

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