Stonehill chairs HB Solutions, LLC, an affiliate of the law firm of Harris Beach PLLC. Stonehill has counseled and consulted with health and human services providers, including Alliance members, full time for more than 25 years. He specializes in planning, designing, evaluating, and implementing corporate organizations and reorganizations, mergers, acquisitions, affiliations, and joint ventures.

Stonehill and his firm also deal with other structural and operational issues, with particular emphasis on corporate governance and compliance, financial transactions, and privacy and record retention policies and practices. He has developed a disciplined approach to organizing large transactional projects according to their requirements, with defined mileposts against which to measure progress toward conclusion.