Massachusetts hosts a dense ecosystem of cybersecurity companies, advisory firms, and research-driven security platforms. Organizations in this sector operate at the front line of cyber defense—developing technologies, consulting on security strategy, and securing complex environments across industries. Chief Information Security Officers working within this space must not only defend their own organizations but also influence broader security practices across clients, partners, and the wider cyber ecosystem.
John Moynihan — Fractional Chief Information Security Officer, Minuteman Governance
John Moynihan brings extensive experience designing information security, privacy, and compliance strategies across regulated industries. As a fractional Chief Information Security Officer at Minuteman Governance, he advises organizations on risk identification, countermeasure planning, and governance frameworks. His work spans insider and external threat mitigation, disaster recovery planning, incident response readiness, and system security planning across major frameworks including HIPAA, FISMA, NIST 800-53, NIST 800-171, and ISO 27001.
Steve Phelps — Chief Information Security Officer, Independent Connections
Steve Phelps leads cybersecurity strategy and operations at Independent Connections, where he progressed through multiple security leadership roles before becoming Chief Information Security Officer. His experience includes managing security operations, overseeing defensive infrastructure, and strengthening enterprise resilience. Earlier roles in healthcare cybersecurity provided hands-on experience protecting complex operational environments and supporting security program development.
Leslie Nielsen — Chief Information Security Officer, Mimecast
Leslie Nielsen is Chief Information Security Officer at Mimecast and a cybersecurity executive with more than 25 years of industry experience. Throughout his career he has held multiple C-level security leadership roles and advised organizations on security strategy, privacy governance, and cyber risk management. Nielsen is also a frequent conference speaker and has served on enterprise architecture and cybersecurity steering committees supporting Fortune 500 organizations.
Alexander Mirchevsky — Chief Information Security Officer and Chief Security Officer, Charles River Analytics
Alexander Mirchevsky leads enterprise cybersecurity, risk management, and IT strategy at Charles River Analytics, supporting advanced research and government programs across classified and unclassified environments. His leadership includes achieving a perfect-score CMMC Level 2 assessment, building accredited classified development enclaves, and modernizing infrastructure through secure hybrid cloud architectures. He has also integrated security directly into engineering workflows through DevSecOps platforms and secure containerized development environments.
David Byler — Fractional Chief Information Security Officer, Omega Security Partners
David Byler serves as a fractional Chief Information Security Officer at Omega Security Partners, advising organizations on building practical and sustainable security programs. With more than two decades of experience, he helps companies balance operational efficiency with effective risk reduction. His consulting approach focuses on simplifying complex security challenges, building repeatable processes, and equipping leadership teams with the knowledge needed to strengthen organizational resilience.
Security Leaders Building the Cybersecurity Industry Itself
Within Massachusetts’ cybersecurity sector, Chief Information Security Officers play a unique role—defending their organizations while also shaping the tools, strategies, and governance models used across the broader industry. Their leadership helps advance security practices not just for individual companies, but for the wider digital ecosystem.
To see how these security practices translate into enterprise platforms and technology companies, explore CISOs to Watch in Massachusetts’ Software Industry.