Clark Testing: Detailed Company Information & Corporate Profile
Summary
Clark Testing is an independent testing firm headquartered in Jefferson Hills, Pennsylvania, that has served the aerospace sector since its founding in 1992. With a team of 100‑200 professionals and annual revenue between $10 million and $50 million, the company delivers expertise across a wide array of specialties including EMC/EMI, shock and vibration, seismic analysis, environmental life‑cycle testing, particle characterization, analytical chemistry, oil analysis, fuels and lubrication, NACE corrosion testing, industrial hygiene, structural fatigue, powertrain and gearbox evaluation, as well as hydraulic and pneumatic systems.
Leadership at Clark Testing is led by President Paul Heffernan III and CEO Paul Heffernan, with Vice Presidents Michael Johnston and Jeremy overseeing human resources, communication, administration, information security and compliance. The team includes quality coordinators, test engineers, laboratory technicians and specialists such as Gary Loomis in fuels & lubricants and Veronica Nowacki in industrial hygiene.
| Clark Testing Website | clarktesting.com |
| Social Links |    |
| Phone Number | 888-325-8517 |
| Industries | |
| Clark Testing Headquarters Address | 1801 Route 51, Jefferson Hills, Pennsylvania, 15025 US |
| Company Size | 100-200 employees |
| Specialities & Services | EMC/EMI, Shock and Vibration, Coal/Coke/Petcoke, Seismic, Environmental/Life Cycle/Aging, Particle Characterization, Analytical Chemistry, Oil Analysis, Fules/Lubrication, NACE, Industrial Hygiene, Structural Fatigue/ Load, Powertrain/Gearbox, Hydraulics/Pnuematics |
| SIC Code | 1382 |
| NAICS Code | 213112 Support Activities for Oil and Gas Operations, 541360 Geophysical Surveying and Mapping Services |
| DMA Code | Greater Pittsburgh |
| Founded | 1992 |
| Estimated Annual Revenue | $10M - 50M |
| Operating Status | Independent Company |
| Updated: | 2026-10-08 |
Competitors
Name | Founded | Type | Employees |
|---|---|---|---|
| 1937 | Privately Held | 25 - 100 | |
| 1999 | Privately Held | 100 - 250 | |
| 1988 | Privately Held | 25 - 100 | |
| 1987 | Public Company | 10K - 50K |
Estimated Website Traffic
The chart shows a decline in traffic to the clarktesting.com website. In September, traffic decreased to 855, compared to 935 in the previous month. The highest traffic in 2026 was recorded in March, reaching 2474 visits.
Workforce Turnover
Length of Employment
Clark Testing's workforce includes employees across a wide range of tenure levels.
10% have been with the company for 1 to 2 years10% have been with the company for 3 to 4 years10% have been with the company for 5 to 7 years15% have been with the company for 8 to 10 years55% have been with the company for more than 11 years
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Clark Testing Corporate Information: FAQ
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