Penn Services - Steel Erection

Steel Erection
Our team of experts meet deadlines and goals while safety standards are met.
Penn Services - Steel Fabrication

Steel Fabrication
We are your one-stop shop for all of your steel needs.
Penn Services - General Contracting

General Contracting
Penn takes pride in delivering high quality projects that serve a diversified group of clients.



About Us

Our business experience has brought us the knowledge and know-how to address any and all jobs with a "whatever it takes" attitude. We can back it up...

Kem Mosley

Vice President - Midwest Operations

5100 Farlin Avenue
St. Louis, MO 63115

Phone: (314) 450-6449
E-Mail: kem@pennservicesllc.com


Kem has devoted over 28 years of his life to the construction industry. Kem was the founder, owner and CEO of Mosley Construction, Inc. from 1979 to 2007. Mosley Construction became one of the largest minority owned construction companies in the state of Missouri. Kem oversaw financial management, strategic planning, staff management and business development. Kem also managed every phase of the construction processes including identifying owner's requirements and expectations, working with staff, subcontractors and suppliers on scope development, budget, safety and schedule management.

Some of the major construction projects completed include: Uncas A. Whitaker Hall for Biomedical Engineering at Washington University in St. Louis, The Lindbergh Tunnel, (the only tunnel in Missouri), The New St. Louis Cardinals Busch Stadium, Fort Leonard Wood, Missouri Hospital, and The Arch Parking Garage.

Kem received numerous awards and recognitions which included U.S. Small Business Regional Person of the Year Award in 1992. In 1993 Kem was named the Contractor of the Year at the Fort Leonard Wood, Missouri Installation. Kem received his undergraduate degree from Kansas State University and his master's degree from Washington University, St. Louis.

Penn Services Team Members