Hart Leadership | Executives Leading Healthcare Data Accessibility

Guided by Vision. Grounded in Experience. Driven by Purpose.

At Hart, we believe healthcare data should be accessible, trusted, and actionable for every patient, provider, and innovator. Our Hart leadership team brings decades of experience in health IT, healthcare interoperability, and enterprise transformation — uniting around one mission: to make healthcare data accessibility the new standard across the industry.

Together, we’re leading a healthcare interoperability company built not just to connect systems, but to connect care — creating clarity, confidence, and collaboration through data.

Dominique Gross

Chief Executive Officer

Strategic visionary. Data accessibility pioneer. Healthcare empowerment advocate.

As CEO of Hart since 2023, Dominique Gross provides healthcare data leadership, guiding the company’s mission to eliminate healthcare data fragmentation and empower organizations to achieve true interoperability. With more than two decades of experience driving health IT innovation and go-to-market strategies, Dominique has shaped Hart’s focus on making the impossible possible every day, ensuring that every innovation at Hart advances both operational efficiency and equitable patient care.

Prior to joining Hart, Dominique led strategy and growth initiatives at multiple firms, working as one of the industry's prominent healthcare technology executives to launch connected care solutions for veterans and major health systems. Her leadership philosophy centers on collaboration and integrity, guiding Hart to serve as both a technology provider and a trusted partner for healthcare’s most complex data challenges. Dominique is a frequent speaker on the future of healthcare data ecosystems and a strong advocate for patient empowerment through healthcare data accessibility.

Peter Witonsky

Chief Revenue Officer

Growth leader. Customer advocate. Industry connector. .

As Chief Revenue Officer, Peter Witonsky leads Hart’s go-to-market strategy, overseeing business development, partnerships, and customer success. Peter brings over 25 years of
experience in health IT innovation, commercialization, and enterprise sales, having built and scaled high-growth organizations from sub $1M in revenue to $30M+ and exits.

At Hart, Peter ensures that every engagement delivers measurable value — from accelerating EHR migrations to enabling multi-system data exchange and real-world research collaboration. He works closely with clients to align Hart’s healthcare data accessibility platform with strategic priorities in care delivery, compliance, and analytics. Peter’s approach to growth centers on long-term relationships and being a trusted partner, not transactions — ensuring Hart remains a partner in empowering organizations with their data, not just a vendor.

Matthew Clark

Senior Vice President of Finance

Financial strategist. Operational steward. Catalyst for sustainable growth.

As SVP of Finance, Matthew Clark oversees Hart’s financial strategy, operations, and performance management. With extensive experience guiding technology companies through stages of rapid expansion to exit, Matthew ensures Hart’s fiscal health aligns with its mission to deliver a meaningful, lasting impact in healthcare.

He brings a data-driven approach to financial planning, leveraging insights, discipline, and transparency to support scalable growth and continued health IT innovation. Matthew’s leadership ensures Hart maintains operational excellence and long-term sustainability as the company continues to expand its footprint across health systems, payers, and research networks.

Leading a Movement, Not Just a Company

The Hart leadership team shares a collective belief: that healthcare data accessibility is the foundation for healthcare transformation. Under their guidance, Hart has grown into a trusted partner for organizations across the care continuum, helping hospitals modernize legacy systems, payers enable value-based care, and researchers accelerate discovery. Our leaders don’t just guide a company; they champion a movement, one built on accessibility, accountability, and innovation.

Our Promise

We will continue to build technology that unifies healthcare data and provide healthcare data leadership that unites the industry behind a shared purpose: to make healthcare data universally accessible, reliable, and meaningful. Because when data flows freely, care improves, discoveries accelerate, and patients win.

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