Strata Management Team

William Heyburn

Co-CEO, Chief Financial Officer and Director

William A. Heyburn has served as the Company's Co-Chief Executive Officer and Chief Financial Officer and as one of our directors since August 2025. Prior to that, he served as the Company's Chief Financial Officer and Head of Corporate Development from May 2021 to August 2025, as OldCo's Chief Financial Officer from December 2020 through May 2021, and as OldCo's Head of Corporate Development from May 2018 through May 2021. From 2015 to April 2018, Mr. Heyburn served in various capacities at RedBird Capital Partners LP ("RedBird"), a private investment firm, most recently as Vice President. Prior to joining RedBird, Mr. Heyburn was a member of the U.S. Credit Investment Team at Oak Hill Advisors, L.P., a global alternative investment firm, from 2013 to 2015. Prior to joining Oak Hill, Mr. Heyburn was a member of the investment banking group at Moelis & Company, an independent investment bank, focused on restructuring transactions, from 2011 to 2013. Mr. Heyburn has an A.B. from Harvard University.

Melissa Tomkiel

Co-CEO, General Counsel and Director

Melissa M. Tomkiel has served as the Company's Co-Chief Executive Officer and General Counsel and as one of our directors since August 2025. Prior to that, she served as the Company's President and General Counsel from May 2021 to August 2025, as OldCo's President from January 2021 to May 2021, and as OldCo's General Counsel from February 2015 to May 2021. Ms. Tomkiel also served as OldCo's President, Fixed Wing from 2015 to 2020. From 2010 to 2015, Ms. Tomkiel served as President of LIMA NY Corp., a commuter air carrier operating amphibious seaplanes and rotorcraft. From 2006 to 2010, Ms. Tomkiel was an attorney at Pryor Cashman LLP, a U.S. law firm. Ms. Tomkiel has a J.D. from St. John's University School of Law and a B.A. from the University of Notre Dame.

Amir Cohen

Chief Accounting & Integration Officer

Amir Cohen is Strata’s Chief Accounting & Integration Officer, having built the company’s accounting organization from the ground up through its transition from private to public, and leading key components of the passenger-business carve-out.

Prior to joining Strata,, Amir held senior finance roles across WPP’s agencies and at WPP’s global headquarters, after serving as a manager at PwC. Amir holds an MBA from NYU Stern and is a CPA.

Mathew Schneider

CFO, Clinical Services
VP Finance and Investor Relations

Mathew Schneider has served as VP Finance and Investor Relations since April 2024 and CFO of Strata's Clinical Services business since October 2025.

Prior to Strata, Mat served as a senior analyst at Holocene Advisors L.P. and an analyst at Glenhill Capital L.P focusing on the Industrial sector. Prior to Glenhill Capital L.P., Mat served as a Vice President in Morgan Stanley's equity research division and an Associate in UBS's equity research division.

Mat has a B.A. in Finance from the University of Maryland and is a CFA® Charterholder.

Scott Wunsch

CEO, Logistics

Scott Wunsch is the CEO of Strata’s Logistics business. In 2018, Scott joined Trinity Medical Solutions (which was later acquired by Strata in 2021) after 13 years at LifeCenter Northwest, the largest geographic OPO in the country, servicing Alaska, Washington, northern Idaho and Montana. At LifeCenter, Scott served as vice president of clinical operations, managing overall operations and logistics.

Scott’s experience is an asset to both Strata’s Logistics and Clinical businesses, both of which work closely with OPOs and transplant centers across the country to provide the best logistics and transportation solutions to maximize the gift of life.

Hunter Senning

COO, Logistics

Hunter Senning is Strata's COO, Logistics, managing our fleet of more than 35 owned, dedicated, and third-party aircraft and all new strategic aircraft acquisitions.

Hunter joined our predecessor company, Blade Air Mobility, in 2016. He originally served as Blade's Manager of Fixed Wing operations, focused on managing a dynamic flight department of short-notice jet charter flights. In 2019, he was critical to the launch of Blade's MediMobility division with NYU as a flagship customer and leveraged the relationships he built in the part-135 jet charter space to build out a time-critical network of fixed-wing and rotorcraft aircraft necessary to support organ transplant missions.

Louis Verdetto

CEO, Clinical Services

Louis Verdetto is the CEO of Strata’s Clinical Services business. He is a Cardiovascular Perfusionist by training and has spent his career building and scaling clinician-led healthcare services.

In April 2013, Louis founded Keystone Perfusion Services, LLC after recognizing a need for dependable, high-quality perfusion coverage supported by strong clinical leadership. He grew Keystone from a startup into a multi-state operation by focusing on disciplined execution, building strong local teams, and using M&A tuck-in acquisitions as a core growth strategy. 

To complement his clinical background, Louis returned to school to earn his MBA, strengthening his ability to lead complex organizations, evaluate acquisitions, and integrate new service lines. Keystone’s growth and performance ultimately led to its acquisition by Strata Critical Medical, where Louis continues to lead the company’s clinical care service lines. 

Louis is a native of Northeast Pennsylvania and now resides in Charleston, South Carolina.

Michael Hancock

VP of Organ Recovery

Michael Hancock is Strata’s Vice President of Organ Recovery. In 2012, Michael played a foundational role in the inception of Keystone Perfusion Services, working closely with Louis Verdetto to provide locum tenens perfusion coverage while simultaneously developing full-service perfusion programs throughout the Northeast. Under his leadership, Keystone grew into one of the nation’s leading perfusion staffing providers, supporting many of the country’s top cardiac surgery and ECMO programs.

Beyond staffing, Michael spearheaded Keystone’s global ECMO patient rescue initiative, partnering with air ambulance providers and health systems to safely repatriate critically ill patients on ECMO back to the United States. This program leveraged Keystone’s experienced clinicians to ensure continuity of care and safe international transport.

In 2022, Michael led the Keystone team in launching the Organ Recovery Service Line, with a focus on advancing Normothermic Regional Perfusion (NRP) for organ donors nationwide. Working closely with Dr. Scott Silvestry, Shannon Barletti, and Alex Chappell, he expanded Keystone’s transplant capabilities to include comprehensive thoracic and abdominal surgical organ recovery services for Organ Procurement Organizations and Transplant Centers.

Today, the Organ Recovery Service Line at Strata stands as the premier third-party provider of comprehensive organ recovery solutions, offering NRP and machine perfusion support to more than 60 organizations across the transplant community. Michael and the Strata team remain focused on expanding OPO and transplant center partnerships while advancing the field of transplantation—recovering more organs and improving outcomes for patients on the transplant waitlist.

Michael earned his Bachelor’s degree from Rowan University in Glassboro, New Jersey, in 2006, and went on to complete Cardiovascular Perfusion training at Cooper University Hospital, graduating in 2009. Following graduation, he returned to Cooper as a staff perfusionist, where he also served as Co-Director of the Perfusion School—reflecting his long-standing passion for perfusion education and clinical training.

Christie Campbell

VP of Cardiac Care

Christie Campbell serves as Strata’s Vice President of Cardiac Care, where she brings nearly 20 years of perfusion experience and a strong operational leadership background. She oversees nationwide clinical operations while driving organizational infrastructure initiatives focused on scalable systems, process improvement, and long-term growth. 

Christie’s work bridges clinical excellence with strategic execution, supporting both patient care and business performance. She is known for building strong teams and fostering a culture grounded in accountability, continuous improvement, and employee engagement.

Christie holds a Bachelor of Science from Carlow University, a Perfusion Technology Certificate from the University of Pittsburgh Medical Center, and an MBA.

Eric Moore

VP of Software Development

Eric Moore is Strata’s Vice President of Software Development. 

Eric oversees IT infrastructure, application development, security compliance, and AI initiatives across the Strata organization. His current focus includes leading the technical integration of acquired healthcare systems and implementing enterprise security initiatives. 

Eric brings over 20 years of experience leading and scaling enterprise technology teams across big tech and venture capital-backed organizations and his background spans technology strategy, enterprise software development, and building high-performing engineering teams.

Dr. Scott Silvestry

Chief Medical Officer

Dr. Scott C. Silvestry is Strata’s Chief Medical Officer. He is a nationally recognized cardiothoracic surgeon and physician leader with deep expertise in advanced heart failure surgery, heart and lung transplantation, mechanical circulatory support, and donor organ recovery innovation. At Strata, Scott provides clinical leadership, surgeon engagement, and strategic oversight for next-generation organ procurement and perfusion services.

Dr. Silvestry is the Chief of the Division of Cardiothoracic Surgery and the Jack Copeland Endowed Chair at the University of Arizona.

Throughout his career, Dr. Silvestry has built and led comprehensive programs in heart transplantation, durable and temporary mechanical circulatory support, ECMO, and complex cardiac surgery. He is widely recognized for advancing care at the intersection of surgery, systems design, and technology adoption—particularly in donation after circulatory death (DCD), normothermic regional perfusion (NRP), and emerging organ preservation platforms.

At Strata, Dr. Silvestry focuses on developing clinically rigorous, ethically grounded, and operationally scalable recovery models. He works closely with surgeons, perfusionists, OPO leadership, and transplant centers nationwide to standardize best practices, improve organ utilization, and support high-quality outcomes across diverse donor environments.

Dr. Silvestry is a prolific academic author, peer reviewer, and invited speaker, with publications spanning heart failure surgery, transplantation, mechanical circulatory support, and donor management. He has mentored surgeons and multidisciplinary teams nationally and internationally and is known for a pragmatic, surgeon-first approach to innovation—ensuring that new technologies are clinically sound, operationally feasible, and aligned with the realities of transplant care delivery.