Sarah Williamson 2014Senior Environmental Scientist

Years of Experience: 31


  • B.A. English, Concentration – Environmental Studies, 1989
  • Wetland Delineation Field Training, Coastal Plain Supplement, SWS, 2009
  • Wetland Delineation Training, Eastern Mountains & Piedmont Regional Supplement, 2010
  • Hydric Soils Workshop, 2009
  • MBSS Benthic & Fish Sampling, 2002-2011
  • MBSS Benthic Macroinvertebrate Taxonomy Workshop, 2002
  • Rapid Bioassessment Protocol & Macroinvertebrate Sampling, 1994
  • Plant Taxonomy, 1996


  • MBSS Fish Taxonomy Exam, Qualifying Score, 2004, 2006-2011
  • COE Certified Wetland Delineator, 1994

Highlights of Experience

Sarah, CRI’s Assessment and Planning Team Department Head, is a Senior Environmental Scientist with experience in providing solutions for a wide range of natural resources management issues and specializing in preparing NEPA and other environmental documents, conducting field studies, assessments, and delineations; and providing natural resource permitting. Sarah’s leadership and expertise managing complex regulatory requirements makes her an integral member of highly successful project management teams. Highlights of Sarah’s experience include:

NEPA and Other Environmental Documents
  • prepares natural resources portions of NEPA and other environmental documents
  • delivers expertise in all aspects of process including background research, technical field work, impact analysis, document preparation and agency coordination
  • researches and compiles environmental data for Natural Environmental Technical Reports, Environmental Impact Statements, Environmental Assessments, Natural Environmental Inventories and other documents
Tidal and Nontidal Wetlands
  • delineates tidal and nontidal wetlands
  • performs functional assessments
  • identifies potential mitigation sites
  • evaluates water quality and stream habitat through monitoring of chemical, physical and biological parameters, including benthic macroinvertebrates and fish
Field Studies
  • assesses vegetative communities for health, diversity and wildlife habitat potential as well as conducting rare, threatened and endangered species surveys and forest stand delineations
  • performs natural resource mapping for use in alternative analyses
  • conducts a variety of field studies and environmental assessments using the latest methodologies
  • conducts evaluations of stream health and stability and identifies potential sites for restoration
Water Quality Monitoring
  • performs water quality studies and is familiar with methods of physical and chemical analysis
  • has extensive experience in the application of biological monitoring protocols including EPA’s Rapid Bioassessment and Maryland Biological Stream Survey (MBSS) methods for collection and analysis of data on habitat, benthic macroinvertebrates and fish
  • has achieved a qualifying score on the MBSS Fish Taxonomy exam and has expertise in analyzing and compiling monitoring data for reporting
Permitting and Regulation Management
  • expert in the various processes for obtaining natural resource permits and approvals
  • regularly coordinates with natural resource agencies on permitting impacts to wetlands, streams, critical areas, forests, and other sensitive resources