IT Specialist - Networks

Mott Mac Donald is a global engineering, management, and development consultancy with over 20,000 employees across more than 50 countries and 140+ offices.

We work across incredible global industries, delivering exciting work that is defining our future and making an important societal impact in the communities we serve. Our people power our performance – we succeed when they do. With countless opportunities to collaborate, learn, and grow, the possibilities for excellence are as varied as every individual.

Whether you want to grow as a subject matter expert or broaden your experience with roles across our international community, you’re surrounded by global specialists who want to combine their expertise and champion you to be your best. As a proudly employee‑owned business, we benefit our clients, our communities, and each other, investing in creating the right space for everyone to feel empowered, included, and valued.

Whatever your ambition, Mott Mac Donald is where people come to be brilliant.

As the IT Specialist – Networks (4th Line), you will play a pivotal role in managing and maintaining the organisation’s global network infrastructure, ensuring resilience, performance, and security across both on‑premise and cloud environments. Reporting to the Network Manager, you will provide advanced technical expertise and operational leadership, supporting the delivery of robust network services that underpin business operations.

This senior position requires deep proficiency in modern networking technologies—including LAN, WAN, SDWAN, firewalls, remote access, web proxy, and cloud networking—and a proven ability to oversee, optimise, and secure high‑performing, highly available network services. You will act as the principal escalation point for complex network issues, drive continuous improvement, and ensure the network environment remains current, compliant, and fit for purpose.

As a technical leader within a forward‑looking IT function, you will champion operational best practices, foster a culture of excellence, and collaborate with stakeholders across the business to ensure network services are robust, scalable, and future‑ready. Your proactive approach and commitment to professional development will help the organisation maintain a competitive edge in connectivity and operational agility.

We are committed to building a diverse, inclusive, and high‑performing IT and Security function. In this role, you will help nurture talent, drive innovation, and create an environment where people feel supported, empowered, and valued in their mission to deliver outstanding network services.

• Manage and maintain global network infrastructure (WAN/LAN/MPLS/SDWAN) to ensure stability, reliability, and optimal performance
• Oversee Data Centre and Server Room operations, including hardware, connectivity, and environmental controls
• Administer and optimise firewall technologies (Meraki, Barracuda, Azure, Cisco) for robust security and compliance
• Support and maintain Microsoft Azure and cloud‑based networking solutions
• Deploy and manage cloud‑based web filtering and security services for secure, compliant access
• Monitor network performance using advanced tools (e.g., WUG, Meraki Dashboards), proactively resolving issues to minimise downtime
• Manage access to cloud services (Microsoft and other SaaS platforms) for secure, efficient connectivity
• Administer remote access solutions (Direct Access, ZPA, Meraki VPNs) for a flexible, secure global workforce
• Lead operational processes:
  Problem, Change, Knowledge, Event, Asset Lifecycle, Capacity Management, Monitoring, and Request Fulfilment; assist with incident escalations
• Maintain comprehensive documentation, including network diagrams, technical guides, procedures, and change/test/transition plans
• Provide technical expertise to ensure operational procedures and standards are correctly applied
• Drive continuous service improvement through benchmarking, monitoring, and optimisation
• Act as 4th Line escalation point for change, problems, and incidents, managing resolution and supplier engagement
• Support configuration management, auditing, and…