Senior Manager - Engineering

Mimecast Services Ltd; Greater London; Hybrid; GBP 120,000 - 180,000; Full time

Job summary

Mimecast Services Ltd in London is seeking a Senior Engineering Manager for Email & Collaboration Threat Protection. You will lead one or more squads, owning delivery, people development, and engineering quality at scale.

The role reports to the Director of R&D and requires hands‑on leadership to ensure fast, reliable, secure delivery of security-centric email and collaboration tools. You will drive AI‑augmented development, collaborate with Product Management and Security, and maintain high

Qualifications

• 6+ years of software development experience with progressive engineering leadership responsibilities.
• 2+ years in engineering management, directly line‑managing engineers.
• Proven track record of delivering squads to meet roadmap commitments.
• Strong ability to translate product priorities into executable engineering plans.
• Experience with high‑availability distributed systems and software reliability.
• Hands‑on technical background to lead a deep engineering team.
• Proficiency with modern engineering practices: microservices, CI/CD, IaC, and containerization.

Responsibilities

• Own Squad Delivery: lead engineering squads with accountability for delivery outcomes and team health.
• Develop Engineers: coach, mentor, and grow engineers with clear development paths.
• Champion Engineering Excellence: uphold code quality, testing, observability, and reliability in a global platform.
• Contribute to Technical Direction: translate roadmap into squad delivery plans and participate in architecture decisions.
• Champion AI-Augmented Development: drive adoption of AI tools and governance within the squad.
• Stakeholder Management: align with Product Management, Security, and Operations on priorities and roadmap.
• Operational Accountability: ensure reliability and performance of services with strong on‑call processes.
• People Leadership: participate in hiring, performance management, and building a high‑performing culture.

Skills

Engineering leadership

Squad delivery

People development

Agile / Scrum

Stakeholder communication

Tools

Docker

Kubernetes

Terraform

GitHub Actions

CI/CD

Job description

Senior Engineering Manager, Email & Collaboration Threat Protection

About Mimecast

Mimecast is a leading cybersecurity company that helps organizations protect their people, data, and communications from today's most sophisticated threats. With over 42,000 customers worldwide, we analyze more than 18 billion security events daily to stop attacks before they cause harm. We are pioneers in Human Risk Management, recognizing that people are both an organization's greatest asset and its most significant security vulnerability. Our platform addresses the human element of cybersecurity by combining advanced threat detection, awareness training, and Incydr risk management to reduce the likelihood and impact of human‑caused security incidents.

AI-First Engineering at Mimecast

Mimecast is an AI-First engineering organization. Our teams actively leverage AI-powered development tools to accelerate innovation, improve code quality, and solve complex cybersecurity challenges at scale. We're looking for engineering leaders who embrace these technologies or are eager to master them quickly. Our AI leadership extends beyond how we build to what we build. Our Mihra AI agent delivers 7x faster threat response for customers, and we're recognized as “Agents of Change” in Human Risk Management. Engineers here work at the intersection of cutting‑edge AI tooling and AI-powered security products that protect organizations worldwide.

Email & Collaboration Threat Protection at Mimecast

This is a hands‑on engineering leadership role at the heart of Mimecast's Email & Collaboration Threat Protection platform. Our mission‑critical infrastructure processes 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 Director of R&D for Email & Collaboration Threat Protection, you will lead one or more engineering squads directly, with accountability for delivery, engineering quality, and the health and growth of your team. You lead through people and technical judgement, setting near‑term direction, developing engineers, and creating the conditions for consistent, high‑quality delivery. This is not a role for someone who wants to sit at a distance from the work. You will stay close to the engineering, own the delivery of your squad's roadmap, and hold a high bar on quality and reliability at massive scale. We operate with a sense of urgency. Cyber threats don't wait, and neither do we. You'll lead a team that moves fast, makes decisions with conviction, and delivers results.

What You'll Do

• Own Squad Delivery: Lead one or more engineering squads with full accountability for delivery outcomes, team health, and day-to-day execution. Plan and manage the flow of work across sprints, remove blockers, and ensure your squad ships reliably against its roadmap commitments.
• Develop Engineers: Line‑manage, coach, and grow the engineers on your team. Run regular one‑to‑ones, set clear goals, give honest feedback, and build deliberate development paths for individuals across levels. Identify and grow high‑potential talent.
• Champion Engineering Excellence: Set and uphold high standards within your squad for code quality, testing, observability, release governance, incident response, and secure development practices. Own operational excellence on a zero‑downtime, globally distributed platform, including on‑call quality, post‑incident learning, and continuous reliability improvement.
• Contribute to Technical Direction: Translate the roadmap and product priorities into a credible delivery plan for your squad. Contribute to technical design discussions and architecture decisions, and act as an informed engineering voice for Email & Collaboration Threat Protection within your group.
• Champion AI-Augmented Development: Drive adoption of AI development tools across your squad. Apply the team's governance for responsible AI usage and help measure productivity impact. Lead by example in building an AI‑enabled engineering culture.
• Stakeholder Management: Partner with Product Management, and with Security and Operations counterparts, to align on priorities, resolve dependencies, and keep the roadmap grounded in what the team can realistically deliver. Communicate progress, risks, and trade‑offs clearly to your Director and to peers.
• Operational Accountability: Own the reliability and performance of the services your squad runs. Our platform processes over 1.7 billion emails daily; you'll ensure robust monitoring, a healthy on‑call rotation, timely incident response, and follow‑through on post‑incident actions.
• People Leadership: Contribute to hiring for your squad, including interviewing and levelling input. Manage performance decisively, address engagement and attrition signals early, and help build a team culture people want to be part of.

What You'll Bring

• 6+ years of software development experience with progressive engineering leadership responsibilities.
• 2+ years in engineering management, directly line‑managing a team of engineers.
• Proven track record of leading a squad to deliver consistently, with evidence of improving execution quality and team health over time.
• Strong record of turning product priorities into deliverable engineering plans and communicating credibly with product and engineering stakeholders.
• Background in high‑availability, mission‑critical distributed systems, sufficient to lead credibly and contribute to technical decisions alongside senior engineers.
• A solid hands‑on software engineering background, giving you a credible technical foundation for leading a deep engineering team.
• Experience with modern engineering practices: microservices architecture, CI/CD pipelines (Jenkins, GitHub Actions), infrastructure as code (Terraform), and containerization (Docker/Kubernetes).
• Experience with cloud platforms (AWS preferred) and monitoring/observability tooling.
• Experience partnering with Product Management to drive roadmap execution and deliver customer value.
• Excellent communication, collaboration, coaching, and mentoring skills, with a track record of building and sustaining a high‑performing team.
• Experience delivering software in Agile environments with a strong understanding of DevSecOps practices.

AI Fluency

• As we build an AI‑First engineering culture, we expect engineering leaders to champion and model AI‑augmented development: 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 team. You will be expected to lead by example, integrating AI tools into your own practices and encouraging their adoption across your squad.
• Experience in email security, messaging infrastructure, or cybersecurity product development.
• Experience with email protocols (SMTP, IMAP), authentication standards (SPF, DKIM, DMARC), or threat detection systems.
• Experience contributing to engineering transformation or platform decomposition initiatives.
• Background in SaaS product development with multi‑tenant architecture.
• Engineering or Computer Science degree.

Location

This role is based in London. You will lead a team located in London and Bangalore and collaborate with teams located globally. This is a hybrid role with a minimum of two days a week on site in our London office.

What We Bring

Join our R&D Engineering team to accelerate your career journey, working with cutting‑edge technologies and contributing to projects that have real customer impact. You will be immersed in a dynamic environment that recognizes and celebrates your achievements. Mimecast offers formal and on the job learning opportunities, maintains a comprehensive benefits package that helps our employees and their family members to sustain a healthy lifestyle, and importantly - working in cross functional teams to build your knowledge! Our Hybrid Model: We provide you with the flexibility to live balanced, healthy lives through our hybrid working model that champions both collaborative teamwork and individual flexibility. Employees are expected to come to the office at least two days per week, because working together in person: Fosters a culture of collaboration, communication, performance and learning Drives innovation and creativity within and between teams Introduces employees to priorities outside of their immediate realm Ensures important interpersonal relationships and connections with one another and our community!

Belonging at Mimecast Cybersecurity

Belonging at Mimecast Cybersecurity is a community effort. That’s why we’re committed to building an inclusive, diverse community that celebrates and welcomes everyone – unless they’re a cybercriminal, of course. We’re proud to be an Equal Opportunity and Aff… We particularly welcome applicants from traditionally underrepresented groups. We consider everyone equally: your race, age, religion, sexual orientation, gender identity, ability, marital status, nationality, or any other protected characteristic won’t affect your application. Due to certain obligations to our customers, an offer of employment will be subject to your successful completion of applicable background checks, conducted in accordance with local law. It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. We save companies the embarrassment of awkward data slip ups by disrupting cybercriminal activity. We think fast, go big and always demand more. We work hard, deliver – and repeat. We grow with meaningful determination. And put success well within our reach. We empower each other, live by our values, and always deliver on our purpose. We push each other to be better and expect to be pushed back. This is a community of respect. Where everyone is counted.