Staff Leadership


Larry Hausner

Chief Executive Officer

Hausner has been with the Association since October 2007, bringing more than 20 years of extensive management experience in nonprofits, coupled with a strong understanding of mission-driven organizations. Read more about Larry Hausner.


Shereen Arent
Executive Vice President, Government Affairs & Advocacy

M. Vaneeda Bennett
Chief Revenue Officer

Greg Elfers
Chief Field Development Officer

Debbie Johnson, CPA
Chief Financial Officer

Don Laing
Senior Vice President, Human Resources

Robert E. Ratner, MD, FACP, FACE
Chief Scientific & Medical Officer

Rodney Sampson
Senior Vice President & Chief Technology Officer

Lois A. Witkop, MBA
Senior Vice President Marketing Communications