GEC has been successful because of our quality, dedicated professional staff. Below are details about a few of our key people.

Macon Office

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Thomas E. Driver, P.E. is the President and CEO of GEC and manager of the Macon branch office. Tom earned a bachelor's degree in Civil Engineering from Auburn University and has over thirty-four years of experience in the geotechnical, environmental and construction materials testing fields. Tom is a member of the Georgia Society of Professional Engineers (GSPE), the Society of American Military Engineers (SAME), and the Macon Board of Realtors Commercial Council. He is a Past President of the Macon Chapter of ASCE, past president of the GSPE Middle Georgia Branch, a past statewide President of GSPE, and has been Regional Vice-president and on the Board of Directors for CEC/GA. Tom was named the 1992 Young Engineer of the Year and the 1996 Professional Engineer of the Year in Private Practice by GSPE. Tom is on the Mercer University National Engineering Advisory Board (NEAB). Tom is also a Board Member of Capital City Bank,past member of the Tubman Museum, the Macon Chamber of Commerce, and is a past board President for the Macon Area Habitat for Humanity. Tom is also on the Navicent Health Facilities Committee and is a member of Rotary International. Tom is a registered Professional Engineer in Alabama, Florida, Georgia, Kentucky, North Carolina, South Carolina, and Tennessee.
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Bob Hadden is the Environmental Services Manager for the Macon office. Bob graduated from the University of South Alabama and has over 35 years of experience in the environmental field. Bob provides project management, construction quality control, and environmental consulting services. Bob manages a staff of biologists, environmental specialists, safety professionals and others in the performance of environmental services for the firm. Bob's environmental experience includes Phase I and Phase II environmental site assessments, regulatory assessment and compliance auditing, field sampling and analysis by immuno-assay, subsurface investigations to assess soil and groundwater contamination, construction monitoring for remediation projects, asbestos, lead based paint, radon, and other hazardous material surveys. Bob also has experience in underground storage tank removal, site assessment and site remediation. Bob is past treasurer of The Georgia Environmental Information Association (EIA) and is a member of the Macon Chamber of Commerce and the Georgia Water & Pollution Control Association.
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Jon A. Spaller, P.G. is the Chief Geologist of the firm. Jon graduated from the State University of West Georgia with a bachelor's degree in Geology, and has over thirty-six years of experience in the geotechnical and environmental consulting fields. Jon has extensive experience in subsurface explorations and geotechnical engineering evaluations for commercial and industrial developments, dams, and solid waste facilities. Jon has been heavily involved in solid waste disposal facility consulting for the past 20 years, directing numerous site evaluations for solid waste landfills. He has directed compliance monitoring programs and assessment of corrective measures studies for numerous Georgia landfills and has also served as Construction Quality Assurance Project Manager for several Subtitle D disposal cell construction projects. He currently provides technical assistance to GEC professionals on solid waste, UST, and ESA projects. Jon is a registered professional Geologist in Georgia, and is a member of The Solid Waste Association of North America and the Georgia Groundwater Association.
Carrie-Holderfield
Carrie Holderfield, P.G., P.M.P. is a Senior Geologist and Project Management Professional for the Macon office. Carrie has over eight years of experience in the fields of environmental assessment and remediation, including management of Superfund, leaking petroleum storage tank, Voluntary Clean-up Plan, Brownfield, and private client projects. She has planned and conducted Hazardous Materials Surveys for commercial structures, and provided project management and supervision of field technicians during performance of asbestos and lead surveys, asbestos remediation, and subsequent demolition activities.  Carrie has performed or reviewed over 100 Phase I Environmental Site Assessments. She plans and conducts Phase II ESAs including collection of soil, groundwater, air, and soil vapor samples for laboratory analysis and subsequent interpretation within the framework of applicable state and federal regulations.  She is a registered Professional Geologist in Georgia and Texas.
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Jerry B. Williams is the Construction Services Manager for the Macon office. Jerry has over 28 years' experience in construction testing and construction management, providing construction quality control, construction quality assurance, construction management, and project superintendent duties. Jerry manages a staff of engineering technicians, is the GEC Radiation Safety Officer, and oversees the materials laboratory for the firm. Jerry is experienced in quality assurance/quality control testing and monitoring of soil, concrete, steel and masonry building materials. In addition, Jerry has served as chief of quality control on U.S. Army Corps of Engineers projects and as quality assurance representative for the U.S. Army Corps of Engineers on projects throughout Georgia. He has also worked in the general contracting field as a project manager and construction site superintendent.
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Tameka Gordon is the Office Manager and a Senior Environmental Specialist for the Macon office. Tameka graduated from Middle Georgia State University with a bachelor’s degree in Business Management and Information Technology in 2016.  Tameka has seventeen years’ experience. She has worked directly in the environmental field, providing project management and environmental consulting services. Her environmental field experience has included Phase I environmental site assessments, Georgia Department of Community Affairs (DCA) and Housing and Urban Development guided environmental assessments, and field sampling. She has performed a number of Georgia Board of Education school site assessments and hazard assessments utilizing the ALOHA (Areal Locations of Hazardous Atmospheres) computer program designed especially for the use by people responding to chemical releases, as well as for emergency planning and training.  Tameka has performed numerous Board of Regent’s GEPA (Georgia Environmental Policy Act) / NEPA (National Environmental Policy Act) site assessments for University and College projects in surrounding counties. She is a member and has completed various training programs through the Society for Human Resource Management (SHRM).  Tameka is also a member of the Women in Affordable Housing Network, Career Women’s Network, and ASTM International. She is a 2008 graduate and past board member for Leadership Macon. She currently serves on the Central Georgia American Heart Association Go Red for Women Executive Leadership Team and the Board of Trustees for the United Way of Central Georgia and the Career Women’s Network.
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Paige S. Davis, MSE, EIT has worked with GEC since April of 2013, initially as an intern and currently as a staff engineer and has passed her Engineering in Training (E.I.T) certification. She works directly in the environmental field, working on Phase I and Phase II environmental site assessments, preparation of remediation and implementation of plans for leaking underground storage tank (LUST) sites, preparing Part A and Part B Corrective Action Plans (CAP), and UST closure reports. Field experience includes conducting Type II and Type III monitoring well installation, soil and groundwater sampling, slug testing, and other field activities. Davis has also performed groundwater modeling in order to determine contaminant plume migration patterns and alternate remedial goals for groundwater. She has also worked on multiple air permit applications and updates. Paige has also served as project manager for preparation of storm water pollution prevention plans (SWP3s) industrial storm water permits and spill prevention control and countermeasures (SPCC) plans. As a project engineer, Ms. Davis shares the responsibility of project management, performing subsurface evaluations for proposed and existing sites, as well as other project-related tasks. Paige graduated from Mercer University with a Bachelor of Science in Engineering, Environmental Specialization degree and a Master of Science in Engineering, Environmental Specialization degree in 2014.

Columbus Office

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Jason Cooper, P.E is the Branch Manager for the firm’s Columbus, GA location. Jason graduated Cum Laude from Mercer University with a Bachelor's of Science in Engineering with a Specialization in Environmental Engineering in 2002. He earlier earned an Associate in Arts degree from Skagit Valley College. Jason served 6 years in the United States Navy Seabees, which is the Navy's Engineering and Construction department. He also has over 15 years experience in the environmental field, providing project management and environmental consulting services. Jason is a member of the American Society of Civil Engineers (ASCE), the Society of American Military Engineers (SAME), the Water and Environment Federation (WEF), and the Georgia Society of Professional Engineers (GSPE), where he is the state President. He was elected the GSPE 2008 Professional Engineer of the Year in Private Practice. Jason is a 2007 graduate and current Board member of Leadership Macon. He is a registered Professional Engineer in Georgia and Alabama.
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Kevin Strumpler, P.G. is a Project Geologist and manages Environmental Services in the Columbus branch office. Kevin graduated from Columbus State University in 1996 with a Bachelor of Science degree in Geology. Kevin is a member of the Geological Society of America (GSA), the National Ground Water Association (NGWA), the Georgia Geological Society (GGS), the Alabama Geological Society (AGS), and the American Institute of Professional Geologists (AIPG). Kevin has over 14 years of experience in the environmental field, providing project management and environmental/geotechnical consulting services. His experience has included Phase I/II Environmental Site Assessments (including Georgia Environmental Policy Act (GEPA) and Department of Community Affairs (DCA) ESAs); Underground Storage Tank Closures and Corrective Action Investigations in Georgia and Alabama; geotechnical investigations; soil and groundwater sampling and remediation; deep foundation installation monitoring; emergency spill response; and consulting for Solid Waste Landfills. Kevin is a registered Professional Geologist in Georgia, Alabama, and Florida.
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Bianca Wilson, E.I. is a Staff Engineer for the Columbus office. Bianca received a Bachelor's Degree in Civil Engineering from Auburn University in 2016. She earlier graduated Magna cum Laude from Wallace Community College with an Associate in Science degree. Bianca is experienced in geotechnical evaluations and design for both shallow and deep foundations systems, site development, and site specific seismic evaluations including shear wave velocity testing. She is also experienced in project management, construction quality control, construction quality assurance, and Phase I Environmental Site Assessments. Bianca is a member of Greater Columbus Georgia Young Professionals.