615 460 9797

Silas Mathes, Senior Project Scientist


Silas Mathes is a project scientist with over 10 years of public sector environmental experience focusing on water quality permitting, rare, threatened and endangered species management, and spatial analysis. He has performed regulatory work involving stormwater quality, hydrologic determinations, and aquatic resource alteration for both Metro Nashville’s NPDES stormwater program and the State of Tennessee Department of Environment and Conservation. Additionally, he provided regulatory oversight and guidance to local stormwater (MS4) programs in Sumner and Wilson Counties.

As environmental review coordinator for Tennessee’s Natural Heritage program, Mr. Mathes completed reviews of development projects to determine impacts to rare, threatened or endangered species under federal NEPA and ESA regulations as well as Tennessee’s rare plant and wildlife protection laws.  As Natural Heritage data manager he maintained Tennessee’s Biotics system, a nationally standardized, GIS-enabled database that catalogs the locations of rare, threatened and endangered plants and animals.  He performed a variety of spatial analysis and data management tasks, including map creation, image classification, terrain/habitat suitability analyses as well as the generation of web-enabled mapping and database sites.

He has field experience searching for rare plant and animal species, prescribed fire, and invasive species removal.Mr. Mathes has interests and skills in geographic information systems analysis, hydrologic characterization, construction stormwater, technology for field data collection, threatened and endangered species searches and identification, and natural resources data management through web and mobile application development.



  • 2012-present – Project Scientist, BDY Environmental, Nashville, TN.
  • 2006-2012 Data Manager/Environmental Review Coordinator, Tennessee Department of Environment and Conservation, Natural Heritage Program.
  • 2004-2006 Environmental Specialist, Tennessee Department of Environment and Conservation, Water Pollution Control, Nashville Field Office.
  • 2002-2004 Environmental Compliance Officer, Metro Nashville Stormwater NPDES Program.
  • 1999-2002 GIS Technician, Natural Resources Spatial Analysis Laboratory, University of Georgia Institute of Ecology.
  • 1997 New Hampshire Parks AmeriCorps Participant.


  • AB, Duke University, Environmental Science and Policy, 1996
  • MS, University of Georgia Warnell School of Forest Resources, Hydrology, 2002


  • Tennessee Qualified Hydrologic Professional Certification (#11XX-TN13)
  • TN Geographic Information Council