Supervisory Staff

Horace Wayne Walker

Horace Wayne Walker, Jr., CFedS, PLS

  • Chief Executive Officer
  • State Survey Licenses in Alabama, Arkansas, Kentucky, Florida, Mississippi, Missouri, Ohio, South Dakota, Texas & West Virginia
  • Certified Federal Surveyor

Mr. Walker has more than 39 years' experience in the surveying profession. His current duties as CEO include overall management of company business along with business development in the federal, state and local markets. He has been directly responsible for securing more then 60 million in federal and state IDIQ contracts over the last 15 years. Those IDIQ contracts were for the following state and federal agencies Alabama DOT; Alabama Department of Conservation & Natural Resources; USACE Districts of Jacksonville, Mobile, New Orleans and Pittsburgh; NGS/ NOAA; NRCS; USFS and USFWS. Other duties include QA/QC on projects such as As-built Surveys, Large and Small Boundary Surveys, Construction Stake-Out, GIS, GPS Control (RTK and Static), Hydrographic Surveys (including Multi-Beam) Mean High Water Lines, Mortgage Surveys, Route Surveys, Topographic Surveys, Wetland Delineation, etc.

Ralph L. Riggs, PLS, CFedS

  • President
  • State Survey Licenses in Arkansas, Kansas, Kentucky, Louisiana, Missouri & Texas
  • Certified Federal Surveyor
Ralph L Riggs

Mr. Riggs has 40 years’ experience in the surveying profession. His current duties as President of the Survey Division include management of Midwest Operations. He has been directly responsible for securing numerous IDIQ contracts over the last 28 years. Those IDIQ contracts were for the following state and federal agencies: Missouri DOT; Missouri Department of Conservation, Missouri Department of Natural Resources; U.S. Forest Service, U.S. Fish & Wildlife Service, Ozark National Scenic Riverways, NRCS and several municipalities. He has been the elected Howell County Surveyor since 1989 and is an instructor in GLO retracement workshops and state survey association seminars. He is also a past president of the Missouri Society of Professional Land Surveyors.

Ray L Riggs

Ray L. Riggs, PLS

  • Survey Vice President- Missouri
  • State Survey Licenses in Mississippi, Missouri, Nebraska & Oklahoma
  • Secretary-Treasurer of Missouri Society of Professional Surveyors (MSPS)

Ray Riggs is a fifth- generation resident of Howell County, Missouri and a first - generation land surveyor. Ray has worked within the surveying profession since graduating from high school, as a rodman, instrument operator and crew chief. He was a Project Manager and Project Surveyor with Riggs & Associates, Inc. since 1989, and has continued on with FGS after the acquisition. His projects have included many large cadastral surveys for the U.S. Forest Service, the U.S. Fish & Wildlife Service, the Missouri Department of Conservation and many private clients. He has completed large and small boundary projects, subdivision lot surveys, construction stake-out, large scale GPS control surveys, topographic surveys and FAA 405 surveys. Ray’s special area of concentration for several years has been ALTA/NSPS surveys for commercial clients. These projects have mainly included Dollar General store sites and O’Reilly Automotive store sites, among others.

Douglas Wayne Cothern, PLS 

  • Survey Vice President- Florida
  • State Survey License in Florida

Mr. Cothern has over 30 years’ experience in the Surveying profession, and has been involved in projects for both public and private sector clients.  Doug has experience with a variety of projects including boundary surveys, large scale topographic, construction staking, section breakdowns and countless residential and commercial surveys.  Doug is also well versed in elevation certificates and other FEMA surveys.

David Ham Photo

David A. Ham, CH CST III

  • Hydrographic Vice President- Florida
  • Certified Hydrographer

Mr. David Ham has 28 years’ experience in the surveying industry. He began surveying shortly after High School as a Rodman. David quickly found a passion for the profession, with a keen interest in the Hydrographic Surveying field.
He has worked as a Project Manager on a wide variety of Surveying projects, from county-wide High Order GPS Height Modernization surveys to First Order Digital leveling.  He has been responsible for both small- and large-scale hydrographic surveying projects for various US Army Corp of Engineers Districts and Government Agencies, in addition to other Public and Private entities.     David holds a CST III – Construction certification, and following his passion for Hydrographic Surveying, became a Certified Hydrographer through the NSPS / THSOA certification program in 2013.