Senior Engineering Manager, Mimecast

• Significant experience managing or leading engineering teams operating large-scale production and hybrid-cloud network environments
• Solid understanding of advanced networking: routing, switching, firewalls, and load balancers at scale
• Strong technical grounding in AWS networking services in large distributed production environments - Direct Connect, Transit Gateway, VPCs, ALB/NLB, auto-scaling groups, security groups, RAM, IAM
• Familiarity with infrastructure-as-code tools such as Terraform, with the judgement to set standards for their use across the team
• Demonstrated ability to hire, develop, and retain strong engineering talent
• Track record of delivering complex infrastructure projects on time, managing trade-offs between reliability, velocity, and cost
• Outstanding communication and collaboration skills, with the ability to translate technical complexity for non-technical stakeholders
• Experience managing engineering budgets and vendor relationships, including procurement, contract negotiation, and cost-benefit analysis for networking infrastructure and tooling
• Relevant degree or equivalent experience. Networking certifications (JNCIA, CCNA, AWS Advanced Networking) or equivalent depth of knowledge are a plus

Desirable

• “This role sits at the intersection of deep technical networking and genuine people leadership. You’ll own the roadmap, shape how we build our hybrid-cloud network, and grow a team that raises the bar for automation and operational excellence. If you believe a reliable, well-engineered network is the foundation that accelerates delivery across an entire organisation, let's talk.” Hiring Manager, Cloud Platform
• Lead and grow the team. Hire, mentor, and develop a team of cloud network engineers. Foster a culture of ownership, technical rigor, and continuous improvement
• Own engineering delivery. Plan, prioritise, execute, and communicate progress on cloud networking initiatives to stakeholders across the business
• Drive the technical roadmap. Shape Mimecast’s hybrid-cloud network architecture through design, deployment, capacity planning, and performance tuning
• Be the escalation point. Serve as the senior technical escalation for complex network incidents and architectural decisions within the Cloud Networking team
• Collaborate cross-functionally. Work with Architecture, Security, Platform, and Product Engineering teams to define network requirements and align on organisational objectives
• Champion automation. Set the standard for infrastructure-as-code practices. Ensure the team builds scalable, intelligent, and repeatable network automation solutions
• Manage people operations. Hiring, onboarding, performance management, career development, and retention
• Establish engineering processes. Build and refine operational runbooks, reliability practices, and engineering processes to support a production-first culture
• Represent the team. Participate in cross-functional leadership forums and contribute to broader engineering strategy
• Own vendor and budget management. Manage commercial relationships for networking hardware, software, and services - including procurement, licence renewals, vendor performance evaluation, budgeting, forecasting, and cost optimisation
• Shape the future of hybrid-cloud networking at a company investing heavily in its cloud transformation
• Build deep expertise across private data centre, AWS, and emerging cloud networking technologies
• Grow into broader engineering leadership roles
• Develop commercial and vendor management skills alongside your technical leadership
• The Cloud Networking team exists to make the network an enabler, not a bottleneck
• The team’s purpose is to deliver a platform so reliable, performant, and well-abstracted that Product and Engineering teams across Mimecast can ship faster and deliver more for customers
• Day to day, you’ll split your time between people leadership and technical leadership
• You’ll work closely with peer engineering managers in Cloud Platform and with architects and security teams across the organisation
• The expectation is hands-on technical credibility combined with a genuine focus on team health and individual growth