About
Leadership
About Defy
Experienced cybersecurity leaders focused on your success
With decades in the industry, our leadership, advisors and board bring all of their cybersecurity expertise to the table to add value to our clients, vendors, and partners.
company leadership
Justin Domachowski
Founder & CEO
In founding Defy, Justin brings over a decade of experience, working with some of the world’s largest financial institutions and enterprise customers while building strong relationships within the CISO community. He led the way at Accuvant and Optiv as the top performer by helping clients strategize for the future, and support their teams’ initiatives. His total focus on customers’ success grew Defy into what it is today.
Justin’s four children and wife keep him happy and busy when he’s out of the office. He also spends time serving his community and volunteering.
“I love becoming an extension of our customers’ team and showing them the real value of trust, transparency and integrity. Doing the right thing for them is the true heart of what we do.”
Jeremy Gilbert
Chief Operating Officer
A Defy co-founder and 16-year veteran of the IT industry, Jeremy has substantial experience in internal operations, having held direct management roles in client operations and sales support at Optiv and Accuvant. He’s built the company’s operations department from the ground up.
Jeremy lives in his hometown of Buffalo, where he claims to love even the winters. When he’s not doting on his wife and young daughters, he’s usually watching live music or playing guitar.
“Defy is the best of both worlds for our clients. We have a boutique feel and a customer-first approach, combined with a wealth of expertise and experience behind us. That’s exactly what was needed in the marketplace.”
Lisa Gillette
Chief Financial Officer
Lisa was appointed in March 2023 as the Chief Financial Officer of Defy Security helping lead this high growth venture-backed company through its strategic transformation and future opportunities. She comes to Defy with 20+ years of successful leadership roles in both public companies and high-growth international private equity environments. Lisa has extensive experience in merger and acquisitions, technology transformation, operational excellence, and strategic finance. She has a proven track record of delivering successful outcomes across the range of company’s stakeholders-investors, employees and customers. Most recently she was the Global Controller at Coalfire, a cybersecurity firm providing advisory, compliance and penetration testing expertise.
Lisa is originally from New York and currently resides in Denver, Colorado. She is a proud “Girl Mom” of two competitive teenage athlete and in her spare time she enjoys playing golf, skiing and traveling.
Kym Kaelber
Director of Services Operations
With nearly a decade in cybersecurity operations, Kym is a super-networker and relationship-builder. She relishes delivering exceptional experiences on behalf of Defy Security customers. Whether she is working directly with customers to customize a contract or building relationships with top-tier cloud-migration consultants, Kym brings optimism and a commitment to excellence to every project and conversation.
Kym lives in Ohio, where she enjoys spending time with her family, traveling to the California coast, and having a great cup of coffee.
board members
Frank Young
Chairman
Michael Dougherty
Member
Justin Domachowski
President Defy Security
David Roshak
Vice Chairman
What it takes
We’re always looking for experienced and committed cybersecurity professionals who are driven to help clients and colleagues be their best. Are you ready to defy the status quo?
Why Defy?
The cybersecurity landscape is already crowded. Why create something new? Because we know that clients need more.