Senior Network Engineer

Location: Greater London

Senior Network Engineer page is loaded## Senior Network Engineer locations:
Great Britain - London time type:
Full time posted on:
Posted Todayjob requisition :
R6132
** Senior Network Engineer
***
* About the Company:

** Join a passionate and innovative team dedicated to designing, implementing, and supporting robust network infrastructure across Mimecast’s global corporate operations.  We’re committed to leveraging cutting-edge networking technologies, automation tools, and best practices to deliver reliable, secure, and high-performance connectivity that enables seamless communications, enhances productivity and provides exceptional user experiences for our worldwide family of Mime casters.
** Role Overview:
** As a Senior Network Engineer, you will be responsible for the day-to-day operation, troubleshooting, and continuous improvement of Mimecast’s global corporate network infrastructure.  You’ll work with diverse networking platforms including Cisco, Juniper, and Aruba to maintain optimal performance and availability.  Collaborating closely with IT, Security, and Workspace teams, you’ll resolve complex network issues, implement strategic upgrades, and leverage automation to enhance operational efficiency across Mimecast worldwide operations.
*
* What You’ll Do:

*** Design, build, and maintain network infrastructure across Mimecast’s global office locations, including edge routing, enterprise switching, and wireless systems to support hybrid workforce connectivity.
* Monitor, troubleshoot, and resolve complex network issues affecting LAN, WAN, SD-WAN, SASE, and wireless services, ensuring optimal performance and minimal downtime for both on-site and remote users.
* Configure and maintain out-of-band management infrastructure to ensure administrative access and recovery capabilities across all network devices globally.
* Collaborate with Security teams to implement and maintain network security policies, access controls, and segmentation strategies that protect corporate assets and user data.
* Partner with Workspace and IT teams to ensure network infrastructure supports collaboration platforms, productivity tools, and hybrid work technologies seamlessly.
* Develop and maintain comprehensive network documentation, including topology diagrams, configuration standards, runbooks, and change management procedures.
* Lead network upgrade projects and technology refresh initiatives, evaluating new solutions and implementing strategic improvements to enhance performance and scalability.
* Leverage automation tools and scripting to streamline network operations, reduce manual tasks, and improve configuration consistency across multi-vendor environments.
* Participate in on-call operations to provide 24/7 network support for critical incidents affecting Mimecast’s global workforce.
* Engage with business stakeholders and end users to understand Mimecast’s evolving business needs and continuously enhance the digital user experience.
** What You’ll Bring:
*** A wealth of experience with enterprise network engineering experience with demonstrated expertise in designing, implementing, and supporting large-scale network infrastructure
* Extensive hands-on experience with Juniper platforms including Mist, EX switches, and SRX firewalls, including configuration, troubleshooting and optimization.
* Strong proficiency with Cisco Meraki solutions for network management, including cloud-managed switching, wireless, and security appliances.
* Proven experience deploying and managing Aruba wireless infrastructure in enterprise environments with multiple sites and diverse user populations.
* Working knowledge of Opengear or similar out-of-band management platforms for remote device access and network recovery.
* Experience with SASE (Secure Access Service Edge) and ZTNA (Zero Trust Network Access) solutions supporting secure hybrid cloud and remote workforce connectivity.
* Comprehensive enterprise wireless planning expertise including RF site surveys, heat mapping, interference analysis, capacity optimization, and adapting to evolving wireless spectrum standards (Wi-Fi 6/6E/7)
* Strong understanding of network protocols including BGP, OSPF,…