Radiation Oncology Services of America

With over 20 years of experience in the healthcare industry, Mr. Martin has executive oversight for Radiation Oncology Services of America. Prior to joining ROSA, Mr. Martin served as Executive Vice President and Chief Operating Officer for Nashville-based Renal Care Group, where he had overall management responsibility for Renal Care Group's dialysis operations. He helped lead the company's 450 outpatient dialysis centers, treating over 30,000 patients to reach annual revenues of $1.5 billion, culminating in Renal Care Group's $4 billion sale to Fresenius Medical Care in 2006. Before being promoted to Chief Operating Officer, he served as Group Senior Vice President for Renal Care Group. Prior to joining Renal Care Group in 1997, Mr. Martin was a Vice President for Comprehensive Healthcare of Ohio, a hospital holding company affiliated with the Cleveland Clinic Foundation, where he was responsible for strategic planning, managed care and physician practice management development. He began his business career with Continental Cablevision. Mr. Martin holds a Bachelor of Arts degree in Political Science and also holds a Masters in Business Administration from Case Western Reserve University's Weatherhead School of Business Management.

Mr. Chappell joined ROSA in January 2007. Prior to joining the company, Mr. Chappell was Senior Vice President, Secretary and General Counsel of Renal Care Group, Inc., a NYSE-listed dialysis services provider, from 1998 through 2005. In that capacity, Mr. Chappell was responsible for all legal affairs and compliance activities of Renal Care Group, including mergers and acquisitions, securities law filings, corporate governance issues, Sarbanes-Oxley compliance and health care compliance. Before he joined Renal Care Group, Mr. Chappell practiced law at Alston & Bird LLP from 1994 until 1998 and from 1988 until 1992. At Alston & Bird he specialized in corporate and securities law and mergers and acquisitions. From 1992 until 1994, Mr. Chappell was Senior Counsel at Policy Management Systems Corporation, a NYSE-listed provider of computer software and information services to the insurance industry. Mr. Chappell received his A.B. from Duke University and his J.D. from the University of Texas.

Mr. Merrill has over 15 years of healthcare industry experience and is responsible for ROSA's operations and physician relationships. Prior to joining ROSA, Mr. Merrill worked at Renal Care Group to implement revenue enhancement and operating efficiency strategies as part of the operations leadership team. Also at Renal Care Group, he oversaw physician relations and strategies, to include multiple de novo physician practice and dialysis unit implementations. Prior to Renal Care Group, Mr. Merrill served in multiple operations and development roles with PhyCor, a pioneering company in the field of physician practice management. He holds a Bachelor of Science in Business Administration from Appalachian State University and also holds a Master of Business Administration and Master of Science in Health Administration from the University of Alabama at Birmingham.

Mr. Cerino has over 20 years of finance and accounting experience in both the public and private sectors. He is responsible for coordinating operations finance for ROSA including the integration of acquisitions. Prior to joining the company, Mr. Cerino joined Renal Care Group in 2001 as a Regional Controller with responsibility for all accounting and reporting functions for two regions. He was promoted to Vice President, Operations Finance in 2004 with financial responsibility over three regions representing 30% of the Renal Care Group’s operations. Prior to joining Renal Care Group, Mr. Cerino was a divisional Controller for Shiloh Industries, a tier I & II automotive supplier. Prior to Shiloh Industries Mr. Cerino was an Audit Senior Manager with Ernst & Young, LLP in Akron, OH. He is a Certified Public Accountant and received a Bachelor of Science degree in Accounting from Baldwin Wallace College.

Mr. Gardner has over eleven years of experience in providing diversified audit and other financial services to public and privately-held healthcare companies. He is responsible for the financial operations of ROSA. Mr. Gardner joined Renal Care Group in 2001, assuming a management role in the company's internal audit function. In 2005, he was promoted to Vice President, Finance to provide leadership for the company in its Sarbanes-Oxley compliance efforts. He was also directly responsible for SEC filings and the company's Medicare cost reporting process. Prior to joining Renal Care Group, Mr. Gardner was an Audit Manager at KPMG, LLP in Nashville, Tennessee, where he coordinated the delivery of audit and other professional services for companies primarily in the healthcare industry. He is a Certified Public Accountant and received a Bachelor of Science degree in Accounting from Harding University.

Dr. Dennis provides medical leadership to Radiation Oncology Services of America. Dr. Dennis served at the Cleveland Clinic Foundation in Cleveland, Ohio in a multitude of roles, most recently as the Chairman of Department of Nephrology and Hypertension from 1992 to 2005. He was instrumental in the creation of Ohio Renal Care Group, a joint venture among the Cleveland Clinic Foundation, the MetroHealth System, and Renal Care Group, and served as Chairman of that Board. He received his Bachelors of Science and M.D. degrees from Georgetown University in Washington, DC and completed his Nephrology fellowship at Duke University Medical Center in Durham, North Carolina, where he served on the faculty as Professor of Medicine and Chief of Nephrology.

Mr. Porter is responsible for ROSA's Information Technology and has over 20 years of multi-industry experience in government, manufacturing, healthcare, biotech and information management. Prior to joining the company, Mr. Porter was the Director of Information Technology for BioMimetic Therapeutics, Inc., a biotechnology company specializing in the development and commercialization of drug-device combination products with an emphasis on musculoskeletal injuries and diseases. Prior to BioMimetic Therapeutics, Mr. Porter was the Director of Information Technology for Gibson Guitar Corporation, and Director of Internet Services for Theraphysics Corporation in Nashville, TN. Mr. Porter received a Bachelor of Business Administration degree in Computer Information Systems from Harding University.

Ms. Wampler joined ASA in August, 2007 and is responsible for the human resources function of ROSA.  Ms. Wampler brings 10 years of experience in the healthcare industry.  Prior to joining ASA, Ms. Wampler held the role of Director, Compensation/HRIS at Renal Care Group in the Human Resources department.  She has also worked in the Human Resources department at the corporate headquarters of Pier 1 Imports in Ft. Worth, TX.  Ms. Wampler received a Bachelor of Arts degree in Psychology from the University of Tennessee - Knoxville.