Executive Staff

Morton Comprehensive Health Services, Inc. (MCHS) Executive Staff


John M. Silva, Chief Executive Officer

As MCHS’ CEO, Mr. Silva directs and manages all Health Center System operations, including administration, finance, human resources, medical and dental services, marketing, public relations and transportation services, among other diverse departments and functions. Mr. Silva formerly served as a Senior Consultant of Professional Services with the National Association of Community Health Care Centers (NACHC), community health centers (CHC), and state primary care associations (PCAs). He has also served as the Chief Executive Officer for Hometown Health Centers (formerly Schenectady Family Health Services), Family Care Health Centers, Alliance for Community Health, and JMS Associates and Managed Care Assistance Corporation. In 1993, Silva was elected President of the National Association of Community Health Centers (NACHC), the largest association of community, migrant and homeless health centers in the nation. He also served on then-First Lady Hillary Rodham Clinton’s Universal Health Care Development Group, representing the nation’s 1000+ community health centers. Mr. Silva is currently the Oklahoma Primary Care Association (OKPCA) President and an executive NACHC board member, representing Region 6, and serves on a number of area boards. Mr. Silva is a graduate of the College of the Holy Cross and attended Columbia University and St. Louis University.


Sean Adams, CPA, Vice-President, Finance and Administration

As MCHS’ interim Chief Financial Officer, Mr. Adams manages MCHS’ finance division and he also provides financial consulting services through his company, Benchmark Advisors, LLC. In both roles, he focuses on financial reporting, internal controls, business intelligence, and performance improvement. Previously, Mr. Adams served as the Executive Vice President of Finance at Lone Star Circle of Care (LSCC). At LSCC, he was responsible for oversight of the health center’s financial operations including the accounting, billing, and credentialing departments. With comprehensive knowledge of non-profits and healthcare accounting, and utilizing 20+ years of experience, Mr. Adams has successfully led annual A-133 financial statement audits, consistently achieving unqualified opinions void of any findings or adjustments and he successfully guided financial operations for organizations experiencing transformational growth. Mr. Adam’s experience includes serving a base of over 100 FQHC’s across the country, providing audit and consulting services with the nationally-recognized CPA and advisory firm, BKD, LLP. As a former financial advisor with American Express, he assisted individuals and businesses reach financial goals through comprehensive financial planning and investment services. Mr. Adams also owned and operated a private logistics firm for over 8 years and he received a B.S. in Finance and a B.S. in Accounting from Missouri State University and is a Certified Public Accountant.


Laura Dempsey-Polan, Ph.D., Vice-President of Community Advancement

Dr. Dempsey-Polan is MCHS’ Vice-President of Community Advancement, responsible for MCHS partnerships, systems expansion, government relations, and strategic initiatives, including foundation planning. She has worked as a health administrator, health and human service analyst and senior planner, researcher, and professor in the fields of disability, aging, behavioral health, and Medicaid for over 35 years. Formerly, Dr. Dempsey-Polan served as an executive administrator in area non-profits and in health care organizations in California, Minnesota, and Iowa. Dr. Dempsey-Polan is an active member of the National Association of Community Health Centers (NACHC), currently serving on the Public Policy and Elder Issues Committees. She has held appointments on OKHCA Living Choice and ACO initiatives, helped found the Oklahoma Olmstead Task Force, Chairs the Tulsa City/County TRIAD and serves on the Community Service Council’s Public Policy Committee. Dr. Dempsey-Polan has been recognized with the Pinnacle Award, the Tulsa Woman of the Year award, and the AARP Award for outstanding contributors. Following two Master’s degrees, Dr. Dempsey-Polan received her Ph.D. in health and human services administration, program evaluation, and public policy from Cornell University. She has authored numerous articles and reports and is a licensed behavioral health clinician.


Michael Montague, P.A.-C, Chief Medical Officer

Mr. Montague serves as MCHS’ Chief Medical Officer, providing leadership and oversite for all medical and related clinical services in MCHS’ Community Health Centers across northeast Oklahoma. Mr. Montague has served as a full scope family practice and primary care provider and in a number of leadership positions on MCHS’ executive team for over 14 years. He has consistently worked to assure primary cares services for those most in need and to help eliminate health disparities in Oklahoma communities. Mr. Montague is a licensed Physician Assistant, and previously served in the U.S. Navy as an Independent Duty Hospital Corpsman, working in both clinical and military settings. He has a Bachelor of Science-Physician Assistant Degree from the College of Health Sciences in Roanoke, VA, and a Master of Physician Assistant Studies from the University of Nebraska. Mr. Montague is also an active member of the American Academy of Physician Assistants and the Oklahoma Academy of Physician Assistants.


Susan Mehnert-Kay, MD, Chief of Family Medicine and Director of the Teaching Health Center

Dr. Mehnert–Kay oversees all family medicine services in MCHS’ Community Health Center medical system and directs this Community Health Center’s Teaching Health Center (THC) for family practice residents in coordination with the Oklahoma University School of Community Medicine in Tulsa; MCHS’ THC HRSA award is one of the first in the region. She graduated from Oklahoma State University with a Bachelor of Science in Biomedical Science and received a Medical Doctorate from the University of Oklahoma. She completed a three-year residency in Family Medicine at the University of Oklahoma in Tulsa, serving as chief resident. During the first 21 years of her career, Dr. Mehnert Kay served as a professor in Oklahoma University’s Family Medicine residency program, as she saw patients in a private practice in the now University of Oklahoma’s School of Community Medicine in Tulsa. Dr. Mehnert-Kay is Board-certified in Family Medicine, a member of AAFP, and has served as the volunteer Medical Director of the SANE program in Tulsa for over 20 years.


Cassie Clayton, RN, Chief Nursing Officer

Ms. Clayton provides leadership and direction for MCHS’ nursing staff in all MCHS health centers, assuring continuity and consistency in this Community Health Center system’s nursing care, while overseeing the implementation of significant clinical and organizational quality initiatives. Ms. Clayton also helps MCHS’ system sustain a focus on key community outreach and education initiatives. Previously, Ms. Clayton served as MCHS’ Director of Nursing and in the role of Nursing Supervisor with the University of Oklahoma’s School of Community Medicine. She is a Board Certified, Registered Nurse and she is also certified in Advanced Cardiac Life Support (ACLS) and Basic Life Support (BLS). Ms. Clayton is a respected speaker, often presenting at events like the Residency Program Services Conference and the Black Executive Exchange Program with the Metropolitan Tulsa Urban League Young Professionals. She is a graduate of Oklahoma Wesleyan University, Tulsa Community College and Tulsa’s Area Vocational School.


Stan Fosburg, Chief Information Technology Officer

Mr. Fosburg defines, updates, and implements all MCHS information technology strategies and operations. He served as a professional services engineer at Nortel Networks and a customer support engineer with Memorex Telex before assuming his current position. Mr. Fosburg is certified as a CVX technician and as a Cisco Certified Network Associate (CCNA) among other certifications in information technology and is a former member of the U.S. Navy.