Meet our team
Mike Green
CEO
Mike Green is the founder and CEO of Remparo, where he leads the company's mission to help hospitals and physician offices respond to and recover from cyber security breaches. Mike brings more than two decades of executive security leadership in healthcare and regulated industries to that mission. He previously served as the CISO for Evernorth Health Services, the $103 billion health services division of Cigna, and as CISO for Availity, the nation's largest healthcare clearinghouse, where he safeguarded the infrastructure connecting providers, payers, and patients across the country.
A sought-after speaker and thought leader, Mike has presented at conferences around the world on cyber threat intelligence, AI security, system resilience, and healthcare cyber security. His perspective, shaped by years defending some of the largest healthcare organizations in the country, has made him a trusted voice for hospitals and physician practices navigating an increasingly complex threat landscape.
David Johnson
COO
David “DJ” Johnson brings more than 35 years of leadership experience across the pharmaceutical, diagnostic, revenue cycle, and health information sectors. As Chief Operating Officer, he oversees organizational strategy, operational performance, and cross‑functional execution, ensuring the company delivers exceptional value to clients, partners, and stakeholders.
David has built a distinguished career guiding national sales, marketing, and operations teams in both healthcare and technology. He has successfully launched and scaled multiple ventures, taking two companies from inception to sustained profitability. David was a founding member of Availity and helped launch what is now America's largest health intelligence network. His expertise spans branding and identity, marketing and communications, operations management, sales leadership, client relations, and business development. He is known for transforming complex challenges into actionable strategies and for creating operational systems that support long‑term growth.
Mark Grasso
CGO
Mark serves as the Chief Growth Officer and is a healthcare sales leader with over 35 years of experience spanning surgical, medical device, and diagnostics sales and enterprise healthcare IT and revenue cycle management leadership. His career began on the surgical side of the business — and even helped pioneer early surgical telemedicine — before he moved into revenue cycle and enterprise healthcare IT, building and leading sales organizations at GE Healthcare IT, Dell Technologies, and beyond.
Throughout his career, Mark has built high-performing sales teams from the ground up, mentoring and developing talent while consistently exceeding quota. He's known for defining go-to-market strategy, establishing new business functions, and leading teams through periods of rapid growth — combining deep clinical, surgical, healthcare IT, and revenue cycle expertise with a hands-on approach to coaching and organizational development.