"A well-regulated Militia, being necessary to the security of a free State, the right of the people to keep and bear Arms shall not be infringed."
- James Madison of Virginia, et al

"... and if you don't have a sword, sell your cloak and buy one"
- Jesus of Nazareth

Welcome to Corish Engineering Online


I am the proprietor, William P. Corish, P.E.  We've been providing mechanical engineering services since the establishment of our firm in 2001. Our work is concentrated in two areas; industrial-grade piping systems and specialized building mechanical systems (i.e., HVAC, plumbing and fire protection).  We offer piping inspection, engineering and construction surveillance services to the following industries and clients:

- petroleum

- chemical

- power

- pulp and paper

- military and government.


Our building systems clients range from multinational corporations to private homeowners.


​Corish Engineering is a joint-venture partner of CJW Ventures.  Our J-V provides industry and government a "one stop shop" for procurement of inspection, assessment, engineering and construction oversight services for mechanical and electrical systems.

My partners are William R. Jennings Jr. Consulting Engineering, PC. and Eagle Inspection Technologies, LLC

Professional engineering


I am licensed to practice engineering in the following jurisdictions:


The Commonwealth of Virginia

The State of Maryland

The State of West Virginia

The State of New Jersey

The State of Texas

The District of Columbia


If you have a project outside of these jurisdictions, it is still possible we can serve you. Many states offer temporary licensure while an application for permanent licensure is processed.  I maintain an NCEES Record to facilitate this process.