Stone Environmental Experts

STONE is an award-winning professional services environmental, ecological, and engineering design firm. Additionally we are 100% woman-owned. STONE holds the following certifications:

  • Woman-Owned Small Business (WOSB), third-party certified through SBA
  • Disadvantaged Business Enterprise (DBE) – Ohio and West Virginia
  • Ohio Encouraging Diversity, Growth, and Equity (EDGE)
  • Small Business Enterprise (SBE) and/or Woman-owned business enterprise (WBE) – Columbus, Dayton, and Toledo, Ohio
  • SBE and WBE for the Northeast Ohio Regional Sewer District (NEORSD)
  • SBE for the Cincinnati Metropolitan Sewer District (GCMSD)
  • DBE Columbus Regional Airport Authority (CRAA)
  • Women’s Business Enterprise National Council (WBENC)


STONE Capability Statement


Ohio Department of Transportation (ODOT) Prequalification

We are prequalified by the ODOT for the following categories:

  • Bicycle Facilities & Enhancement Design
  • Non-complex Roadway Design
  • Right of Way (ROW) Plan Development
  • Bridge Design – Level 1
  • Construction Management
  • Construction Inspection (Construction Engineer Level 1 and Level 2)
  • Environmental Document Preparation – EA/EIS
  • Environmental Document Preparation – CE
  • Environmental Document Preparation – Section 4(f)
  • Ecological Surveys
  • Stream and Wetland Mitigation
  • Waterway Permits
  • Air Quality Analyses
  • ESA Screening, Phase I ESA and Phase II ESA
  • ESA Remedial Design
  • Asbestos Surveys (qualified, but not an ODOT category)

Municipalities and Counties

Our prequalification list or those we have worked for includes the following city, municipal, and county agencies:

City of Bexley

City of Columbus

City of Dayton

City of Dublin

City of Englewood

City of Fairborn

City of Gahanna

Village of Johnstown

City of Marysville

City of Mt. Vernon Engineer

City of Upper Arlington

City of Westerville


Athens County Commissioners

Delaware County Engineer

Franklin County Engineer

Lawrence County

Licking County Engineer

Lucas County

Montgomery County Engineer

Muskingum County

Perry County Engineer

Pike County

Portage County

Sandusky County

Stark County Engineer


Trumbull Metropolitan Housing Authority (TMHA)

Delaware County Regional Sewer District

Columbus Regional Airport Authority (CRAA)

Ohio Turnpike and Infrastructure Commission (OTIC)

Ohio Facilities Construction Commission (OFCC)

Dayton Regional Transit Authority

Heath Newark Licking County Port Authority

Institutions of Higher Learning

Our prequalification list or those we have worked for includes the following institutions:

Bowling Green State University

Kent State University

The Ohio State University (OSU)

Ohio University

Otterbein University

University of Cincinnati

Park Districts

Our prequalification list or those we have worked for includes the following parks and agencies:

Columbus and Franklin County Metro Parks

Columbus Recreation and Parks

Dayton Five Rivers Metro Parks

Delaware County Preservation Parks

Ohio Department of Natural Resources (ODNR)

Muskingum Watershed Conservancy District

U.S. Forest Service (USFS)

Westerville Parks and Recreation

Agency Certifications

Ohio Statewide Unified Certification Program – Disadvantaged Business Enterprise (DBE)

Ohio Department of Administrative Services (ODAS) Encouraging Diversity, Growth, and Equity (EDGE) program

Northeast Ohio Regional Sewer District (NEORSD)

Cincinnati Metropolitan Sewer District (MSD)

Columbus Regional Airport Authority – Disadvantaged Business Enterprise (DBE)

City of Columbus – DBE Female Business Enterprise (FBE)

City of Dayton Procurement Enhancement Program (PEP), Small Business Enterprise (SBE), Woman-Owned Business Enterprise (WBE)

City of Toledo Office of Diversity and Inclusion – Women Business Enterprise (WBE)

Woman-Owned Small Business (WOSB) – Federal U.S. SBA (3rd Party Certified)

Women’s Business Enterprise National Council (WBENC) – Women’s Business Enterprise (WBE)

U.S. Small Business Administration certified Women-Owned Small Business (WOSB)

Licenses / Certifications

  • PE

    Professional Engineer (Ohio, West Virginia, Kentucky, Michigan, New Jersey, Oklahoma)

  • AHES

    Asbestos Hazard Specialist

  • LRA

    Lead Inspector/Risk Assessor


    Leadership in Energy & Environmental Design

  • BCEE

    Board Certified Environmental Engineer

  • CP

    Ohio Voluntary Action Program Certified Professional


    Certified Professional in Erosion & Sediment Control


    Certified Erosion, Sediment, & Stormwater Inspector

  • PWS

    Professional Wetland Scientist

  • Certified Smoke Reader (Visible Emissions)

    US EPA Method 9 certification

  • Ohio EPA

    Ohio EPA Qualified Data Collector Level II/III


    Federal (USFWS) Permit for Mussel Surveys

  • ODNR

    State (ODNR) Permit for Mussel Surveys

    ODNR Herpetologist

“Having worked with STONE on a couple of projects I can say that Mary Sharrett and her staff work diligently to complete projects on time and in a highly professional manner.  They are trusted by state and federal agencies and their experience with permits saves the client time. They are among the best and I look forward to working with them again in the future.”