Jim Hirt, MBA Owner Jim is a veteran association executive with over twenty-six years of leading professional and trade associations in the Washington, DC area. Mr. Hirt has served as the chief staff executive for the Society of Industrial and Office Realtors, The American Society of Appraisers, The American Association of Poison Control Centers, The Public Risk Management Association, and the National Association of Mortgage Brokers. Mr. Hirt received his Bachelor of Arts in Business Administration from California State University-Fullerton and his MBA from National University. He is married to his wife Jen and has two son’s John and Dylan and a new daughter-in-law Caroline (married to John). Mr. Hirt’s executive-level experience leading organizations combined with his strategic vision has given his organizations a leading edge in achieving their strategic goals. Mr. Hirt has achieved a record of success in leading and managing people, changing and fostering creativity, and building successful relationships. Mr. Hirt is devoted to fulfilling his compassion for helping people and is the reason why he is now the owner of Medi-Weightloss, Alexandria, VA.

Dr. Clark received her undergraduate degree from the University of Michigan and her medical degree from the Medical College of Wisconsin in Milwaukee. She then attended the Medical College of Virginia in Richmond for her training in family practice. Dr. Clark has extensive experience in dietary counseling and a passion for nutrition and the biochemistry of metabolism. Her hobbies are gardening, cycling, and cooking. She grew up in the Midwest and has been living in Virginia for the last 35 years.

Marta joined the Medi-Weightloss team in September of 2024 as Office Manager. Born in Portugal but raised in Virginia, Marta holds a master’s degree in healthcare administration from Virginia Commonwealth University in Richmond, Virginia. Outside of Medi-Weightloss, Marta is dedicated to helping animals find their furever home through her nonprofit animal rescue.

John is a native of Alexandria, VA. He earned his undergraduate degree from Clemson University in 2018. After spending a few years on Capitol Hill in Washington, D.C., John began a new career in the world of sales and marketing. Outside of Medi-Weightloss, John may be found spending time outside, listening to music, reading about the natural world, or raising bonsai trees!