About MacGregor
A security consulting firm built on practitioner experience, serving organizations from growing businesses to Fortune 500 enterprises.
The Company
Founded in 2015
MacGregor Consulting was founded to bring enterprise-grade security expertise to organizations of all sizes, without the overhead of large consulting firms.
We specialize in security data solutions, vulnerability management, Microsoft security implementation, and custom application development. Our work spans from building security data lakes at Fortune 5 scale to helping growing businesses implement their first security controls.
How We Work
We operate as a lean firm with senior practitioners doing the work. No account managers, no project coordinators, no layers between you and the people building your solutions.
We leverage modern development practices and generative AI to deliver faster, building in weeks what traditionally takes months. Every engagement is direct, focused, and tailored to your environment.
Our background is in enterprise security operations. We've sat in your seat, and we understand what it takes to get things done in complex environments.
Founder
John Purdy
John spent over 15 years in cybersecurity at Kroll and Marsh & McLennan Companies before founding MacGregor Consulting. His background includes deep expertise in the Qualys platform, including designing and implementing the vulnerability management program at Marsh & McLennan. As principal at MacGregor Consulting, he has built VM and security data solutions for The Home Depot, Elevance Health, and CVS Health, delivering security data infrastructure at scale.
Today, he works directly with clients on every engagement, bringing practitioner experience to security challenges across the Microsoft ecosystem and beyond.