Director of MTA Engineering, Mimecast

• 8+ years of software development experience with progressive engineering leadership responsibilities
• 5+ years in engineering management, including experience leading other engineering managers (second-line leadership or above)
• Proven track record of leading multi-team engineering organisations, with sustained improvements in execution quality, team health, and organisational capability
• Strong record of translating business strategy into engineering plans and representing engineering credibly to VP and C-suite stakeholders
• Background in high-availability, mission-critical distributed systems — sufficient to lead credibly and make informed investment decisions alongside senior technical stakeholders
• Prior experience as a software engineer, providing a credible technical foundation for leading deep engineering teams
• Experience navigating large-scale organisational change — team growth, restructuring, culture transformation, or delivery model shifts
• Excellent collaboration, influencing, coaching, mentoring, and communication skills. A track record of building and sustaining high-performance engineering cultures following transformation or growth periods
• Continuous learning mindset, keeping abreast of relevant industry technologies, tools, and standards
• Demonstrated experience with AI-powered development tools such as GitHub Copilot, Cursor, Windsurf, Claude, or similar assistants, OR
• Strong enthusiasm and commitment to rapidly adopting AI tools and driving their adoption across your teams

Desirable

• This is a senior leadership role at the heart of Mimecast’s Email Security platform. Our MTA (Mail Transfer Agent ) is the mission-critical infrastructure processing over 1.7 billion emails every day for more than 42,000 enterprise customers worldwide — and keeping it fast, reliable, and secure is non-negotiable
• Reporting to the VP of Engineering, you will lead a multi-squad engineering organisation within the Email & Collaboration Security group, with full accountability for delivery outcomes, engineering quality, and organisational health. You lead through managers and senior technical staff — setting direction, building leaders, and creating the conditions for sustained high performance
• This is not a role for someone who just wants to manage day-to-day work. You will own organisational strategy, engineering standards, and the conditions that make reliable delivery possible at massive scale. We operate with urgency: cyber threats don’t wait, and neither do we. You will instil that same mindset across your leadership team
• Own the Organisation: Lead a multi-squad engineering organisation with full accountability for delivery outcomes, team health, and engineering culture. Own organisational design — squad structure, reporting lines, and capacity — ensuring they remain fit for purpose as the business evolves
• Lead Leaders: Build, coach, and develop your Engineering Managers and leads. Hold them accountable for delivery and people outcomes. Build a strong leadership team with clear succession planning for key leadership and senior technical roles
• Drive Engineering Excellence: Set and maintain high standards across your squads: testing, observability, release governance, incident response, and secure development practices. Hold the organisation accountable for operational excellence on a zero-downtime, globally distributed platform — including post-incident learning and continuous reliability improvement
• Own Technical Strategy: Translate product and business strategy into multi-quarter engineering plans. Serve as the senior engineering authority for MTA in executive-level forums — including roadmap planning, major incident response, and strategic investment decisions
• Champion AI-Augmented Development: Drive adoption of AI development tools across your teams. Establish governance for responsible AI usage and measure productivity impact. Lead by example in building an AI-enabled engineering culture
• Stakeholder Management: Partner with Product Management, Security, and Operations leadership to align priorities, resolve cross-organisational dependencies, and ensure the roadmap reflects business-critical needs. Represent engineering at VP and C-suite level, articulating capacity constraints, delivery risks, and investment trade-offs clearly
• Operational Accountability: Own the reliability and performance of the MTA platform. Our infrastructure processes over 1.7 billion emails daily — you will ensure robust monitoring, incident response, post-incident learning, and continuous reliability improvement
• People Leadership: Drive hiring strategy — including levelling decisions and interview standards. Identify and grow high-potential talent with deliberate development paths. Manage budget and headcount for your engineering segment with accurate forecasting. Monitor and respond decisively to engagement, attrition, and performance signals
• You will be expected to lead by example, integrating AI tools into your leadership practices and establishing strategies for AI adoption across your engineering teams