About Us

The O’Sullivan Group is a Healthcare Business Solutions Firm

Our Vision is to be a team of experts that brings solutions and resources to your team.

The mission of The O’Sullivan Group (TOG) is to deliver high value healthcare advisory and consulting services designed to improve performance and achieve strategic objectives. Our firm’s vision is to bring real world know how by offering the same level of service and expertise for both large and small companies that are enjoyed by major Fortune 1000 organizations. This vision and experience is shared by our team of professionals servicing all types of health care organizations.

Founded in 1999, The O’Sullivan Group is a dynamic healthcare consulting company with expert resources to assist with the operational, planning and transactional support needs of hospitals, physicians and other healthcare organizations. The O’Sullivan Group’s team of professionals are trusted advisors to a wide range of healthcare organizations across the country.

We leverage the resources of our six consulting divisions to provide clients with a broad range of business services in the areas of Managed Care Strategy & Payer Relations; Credentialing & Provider Enrollment; Business Development; RCM Evaluation & Coding; Financial Performing & Planning; Network Development.

We apply years of experience and a multitude of industry resources to improve business performance of our clients.

Brian O'Sullivan



Jill O'Sullivan


Chris Asterino


Mark Williamson