- DRS Architects
- DuBois Area United Way
- Dunwoody Village
- Duquesne Light Company
- Duquesne University
- Dwelling House Savings and Loan Association
- ECELS
- Echo Strategies
- Einstein Healhcare Network
- Einstein Medical Center Montgomery
- Einstein Medical Center Philadelphia
- Elections USA Inc.
- Elevator Constructors Local 6
- Elliance
- Ellwood City Hospital
- Embassy Suites Philadelphia Airport
- Embassy Suites Philadelphia Center City
- Emerson Process Management, Power and Water Solutions
- Endovascular
- EPMOD Consultants, Inc.
- Epstein, Tabor and Schorr
- Erie County Convention Center Authority
- Erie Insurance Group
- Erie VA Medical Center
- Ernst and Young - Pittsburgh, PA
- ESRD Network 4, Inc.
- Evangelical Community Hospital
- Excela Health Frick Hospital
- Excela Health Latrobe
- Excela Health Westmoreland
- Excela Westmoreland Hospital
- Expeditor Corporation
- Expo Logic
- Fallingwater
- Family Health Council of Central PA
- Family House
- Family Services of Western Pennsylvania
- Fayette Healthy Start
- Federal Transit Administration-VSDOT
- Ferraro and Fink Executive Search
- Fidelity TeleAlarm, LLC
- Flooring Works
- FMC Corporation
- FMC Measurement Solutions - Erie, PA Facility
- Foamex International, Inc
- Forbes Hospital
- Foreman Architects Engineers Inc.
- Fox Chapel Authority
- Fox Learning Systems, Inc.
- Frank Parsons Paper