Our executive team is committed to ensuring customer organizations can work protected, driven by a shared belief that the best outcomes are achieved together.
Our executive team is committed to ensuring customer organizations can work protected, driven by a shared belief that the best outcomes are achieved together.
Ranjan Singh believes cybersecurity's biggest challenge is that humans, data, and AI are now one problem, not three. Threats converge across all of them, and most organizations weren't built to defend that way.
Since joining as Chief Product & Technology Officer in April 2025, he's unified Product and Engineering into a single innovation engine, accelerating Mimecast's platform capabilities and instilling a sharper operating culture.
Born in India and having lived in Australia and the U.S., Ranjan brings a global perspective to navigating markets and leading teams across cultures. Outside of work, he spends time with his wife and two children in Northern New Jersey.
As Chief Product & Technology Officer, Rob is responsible for driving the product and engineering strategy that powers Mimecast's unified platform. Rob brings more than 25 years of security, IT, cloud, and mobile leadership experience, and steps into this role having already played a central part in building the platform he now leads.
Rob is a frequent keynote speaker at industry events where he shares insights on emerging threat landscapes and practical strategies for security modernization.
As Chief Information Security Officer (CISO), Leslie spearheads Mimecast’s global cybersecurity strategy, including threat intelligence, risk management, and detection & response initiatives. Leslie also ensures regulatory compliance, reinforcing the company’s commitment to delivering the highest levels of protection for its more than 42,000 global customers.
With over 25 years of experience in cybersecurity, Leslie is recognized for his ability to drive innovative security strategies and build resilient, high-performing security organizations. Outside of work, Leslie is an avid hiker and a do-it-yourself coffee roaster. He lives in New England with his wife and their canine kid.
As Chief Marketing Officer, Adenike drives strategic growth and positioning for the Mimecast in new and existing markets. An accomplished technology executive, Adenike has 20 years of experience in the cybersecurity industry across the spectrum of product and business strategy.
She has lived in Japan, Hong Kong and Nigeria, and currently resides in London.
An accomplished finance executive with over 20 years of leadership experience in high tech and enterprise software environments, David helps shape the Mimecast’s strategic roadmap.
As CFO, David plays a key role in helping Mimecast exceed its growth and financial goals, while fostering a collaborative, values-driven culture.
Named Chief Human Resources Officer in November 2023, Janet has nearly three decades of experience leading HR teams in large, global organizations. A considerable part of her time has been working in software/technology organizations undergoing transformation. Janet leads Mimecast’s inclusion and belonging initiatives, partnering with the executive team to shape the company’s people and organization’s strategic roadmap, driven by 'The Mimecast Way’ values.
With over 25 years of broad enterprise software experience, Chris leads cross-functional, transformative projects across Mimecast, enhancing the company's ability to compete and succeed in a rapidly evolving market, particularly through the adoption of artificial intelligence.
Throughout his career, his consistent focus has been on driving growth, organically and inorganically, in rapidly evolving IT markets, and building the robust organizational infrastructure to support that value creation. Born in Switzerland, he and his family take every opportunity to return to Europe for visits.
As General Counsel, Chris and his team work to provide business centric legal advice to all of Mimecast, maintaining a culture of integrity and compliance while delivering on the company’s growth strategy.
Chris is an experienced cybersecurity executive whose helped navigate Mimecast through seven acquisitions during his tenure, and most recently played a vital role in Permira’s acquisition in May 2022.
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