Joni Green, PMP

Chief Executive Officer

Mrs. Green is the founder and owner of Five Stones Research Corporation (5SRC). Mrs. Green is a certified Program Management Professional (PMP) with over 20 years of leadership and management experience. Her academic training and extensive experience in multi-functional program management, marketing, acquisition, and business management support has successfully contributed to DoD systems acquisition and research & development organizations. Mrs. Green is an accomplished professional with demonstrated experience directing corporate strategies. She earned a Bachelor’s degree in Business and Marketing and holds membership in the Greater Huntsville Rotary Club, AAAA, AUSA, SOLE, WID, and PMI. Mrs. Green is married with five children.


Steve Willhelm, MBA, PMP


Mr. Willhelm joined 5SRC in May of 2010 after 22 years of military service and represents 5SRC to industry partners and major customers. His military positions included leadership at the platoon and company level and time as an instructor and operations officer. His acquisition assignments included Assistant Product Manager at Terminal High Altitude Area Defense in the THAAD Fire Control / Communication and Radar Product Offices, Range Control Officer (RCO) at Reagan Test Site (RTS), Deputy Director for the Test Execution Directorate, GMD Joint Program Office and the Product Manager for the ACAT 1-D Joint Land Attack Cruise Missile Defense Elevated Netted Sensor System (JLENS). He has Master’s Degrees in Business, Information Technology Management, and Military Art and Science. He runs a ministry, “Project Abundant Life” with his wife, Leigh.


Greg Gaddy, Ph.D.

Chief Operating Officer

Dr. Gaddy joined 5SRC in June 2012 as the Vice President and now serves as the Chief Operating Officer. He is responsible for the daily operations of the company and works to ensure financial strength and operating efficiency to 5SRC's DoD customers and industry partners. He also works within the executive management team to develop and execute strategic corporate initiatives. He performs emerging market analyses, develops and maintains client and capabilities portfolios, and manages proposals. He is a former Department of the Army civilian where he specialized in advanced materials research, development, and transition. Dr. Gaddy brings over 20 years of experience in Department of Defense and Federal contracting. He earned his doctorate in chemistry from Auburn University in 2001. He and his wife, Christa, have two sons and live in Madison, AL.


Kimberly Gehrdes

Chief Financial Officer

Mrs. Gehrdes joined 5SRC in August of 2012 as a Program Analyst. Two years later she was promoted to Controller and a few short years later, named CFO. She is responsible for the total financial well-being of the corporation to include overall financial plans, policies, and accounting practices. She directs teams responsible for all budgeting, auditing, tax, invoicing, billing, and accounting activities and she administers our corporate financial reporting system with compliant controls and standards. Mrs. Gehrdes brings over 25 years of experience in financial management in both the commercial sector and DoD. She received her Bachelor’s degree in Business Management from Athens State University. Mrs. Gehrdes and her husband, Charles, have four sons and live in Huntsville.