Sean Sipple snapping turtle cropped

Senior Environmental Scientist

Years of Experience: 19


  • M.S., Environmental Science, 2016
  • B.S., Biology, 2002
  • Applied Fluvial Geomorphology, 2005
  • River Morphology & Applications, 2006
  • Advanced Soils & Hydrology, 2004
  • Wetland Delineation, 2004
  • Winter Botany, 2005
  • Nationwide Permits, 2004
  • Advanced Wetland Delineation: Comprehensive Method, 2006
  • Maryland Biological Stream Survey (MBSS) Spring Sampling Training, 2004
  • The EPT Taxa: Systematics and Biomonitoring: Ephemeroptera, Plecoptera, and Trichoptera, 2004
  • Freshwater Mussel Identification and Field Sampling Methodology, 2008
  • Biological Monitoring of Stream Restoration, 2008
  • Stream Restoration, Hydraulic Structure, and Bioengineering Design, 2011
  • MBSS Summer Sampling Training – Herpetofauna Taxonomy Exam Qualifying Score, 2008, 2011, 2012; Freshwater Mussel Qualifying Score, 2011, 2012; Crayfish Qualifying Score, 2011, 2012; Invasive Plants Qualifying Score, 2011


  • MDNR Recognized Qualified Bog Turtle Surveyor, 2019
  • DNREC Recognized Qualified Bog Turtle Surveyor, 2019
  • MBSS Habitat Assessment Certification, 2019
  • MBSS Benthic Macroinvertebrate Sampling Certified, 2012-2019
  • MBSS Laboratory Certified, 2012
  • MBSS Fish Crew Leader Certified, 2012-2019
  • MBSS Fish Taxonomist Certified, 2012-2019
  • MBSS Certifications in Macroinvertebrate Sampling, Lab Sorting, Fish Crew Leader, Fish Taxonomy, 2012
  • Society for Freshwater Science (SFS) Certified Chironomidae Taxonomist, 2012-2019
  • SFS Certified EPT Taxonomist, 2010-2019
  • Professional Wetland Scientist, 2007, 2014
  • Virginia Professional Wetland Delineator, 2008-2019
  • SFS Certified Family-level Taxonomist for Aquatic Invertebrates, 2008
  • SFS Certified Other Arthropods Taxonomist, 2010-2019
  • USFWS Qualified Surveyor for small whorled pogonia (Isotria medeoloides)

Highlights of Experience

Sean has broad experience working in natural resources, in the research, government, and private sectors. Sean conducts, reviews, and assembles complex natural resource studies related to residential, commercial, transportation, and utility projects, both private and public. Highlights of Sean’s experience include the following:

Field Studies

Conducts a wide variety of field studies including:

  • utilizes Maryland Biological Stream Survey (MBSS), Virginia Department of Environmental Quality (VADEQ) and EPA Rapid Bioassessment protocols to assess aquatic communities
  • identifies benthic macroinvertebrates to the family or genus level, depending on the requirements of the project
  • conducts detailed analysis of water quality and biological data, including Index of Biotic Integrity (IBI) and Physical Habitat Index (PHI) calculations to determine the overall health of aquatic communities
  • conducts fish relocation per State and Federal permit conditions for stream restoration projects
Wetland Assessment
  • conducts waters of the U.S. delineations using the US. Army Corps of Engineers 1987 Delineation Manual, and Regional Supplements for the Eastern Mountains and Piedmont and Atlantic and Gulf Coastal Plain regions
  • has prepared Joint Permit Applications for impacts to Waters of the U.S. Has also conducted stream impact assessments using the U.S. Army Corps of Engineers and VADEQ Unified Stream Methodology for Waters of the U.S. permitting
  • has conducted wetland functional assessments using several different methodologies
  • has conducted Submerged Aquatic Vegetation delineations
  • conducts vernal pool delineation and assessments
Mitigation Monitoring
  • has conducted vegetation sampling, well monitoring, invasive species assessment, buffer condition assessments, corrective action plans, and reporting for numerous wetland mitigation projects
  • has conducted vegetation sampling, benthic macroinvertebrate monitoring, natural channel design monitoring, invasive species assessment, buffer condition assessments, wildlife assessment, , corrective action plans, and reporting for numerous stream mitigation/stewardship projects
Rare, Threatened and Endangered Species Surveys
  • has conducted surveys and habitat evaluations for the comely shiner (Notropis amoenus), green floater (Lasmigona subviridis), Wood Turtle (Glyptemys insculpta), Bald Eagle (Haliaeetus leucocephalus), Peregrine Falcon (Falco peregrinus, including F.p. tundrius), Upland Sandpiper (Bartramia longicauda), Loggerhead Shrike (Lanius ludovicianus ludovicianus, L.l. migrans), Henslow’s Sparrow (Ammodramus henslowii), barn owl (Tyto alba), small whorled pogonia (Isotria medeoloides), American Ginseng (Panax quinquefolium), and several rare diabase-associated plants.