About Us

Welcome to the official site of, International Union of Operating Engineers, Local 37.  Local 37 was established on May 16, 1900.

Local 37 is a mid-sized mixed local union representing 1500 members. Mixed local means we represent both Operating Engineers working as heavy equipment operators, mechanic, and welders in the construction industry, and stationary engineers working inside buildings performing all types of facility maintenance. We also have members working in equipment rental houses, shops, and quarries.

Our mission is to provide a decent living wage, comprehensive health care, pensions and annuities for our members. We also have a training facility with up to date technology for all who wish to enhance their skill levels or for those who want to learn how to operate a new piece of equipment. All of our instructors are certified and are more than willing to help you with any of you training needs.

Our geographical jurisdiction includes all of Maryland, with the exception of Charles County, St. Mary’s County, Prince Georges County, and Montgomery County.

Contact Us

Meet our Officers  and Training Staff

Robert A. Holsey, Jr. – Business Manager and Financial Secretary
Mark F. McQuay – President
Thomas M. Boschi – Vice President
Michael B. Funk – Recording Secretary
Daniel S. Humbertson – Treasurer

Executive Board:
Steve J. Rohrman
James E. Nunley, Jr.
Anthony J. Crandall
Phillip E. Grothe
Michael J. McKew, V
Robert J. Pucci

Vasilis Peros
Stephen VanBoesschoten
Thomas W. Costanzi

Thomas I. Judge
Bruce J. Clark
Walter L. Wagner

Michael C. Wines

Jason R. Lewis

Operating Engineers Local 37
3615 North Point Blvd. Suite A
Baltimore, Maryland 21222

Phone: (410) 254-2030
Fax: (410) 319-9197

Operating Engineers Local 37, Cumberland Office
994 National Hwy.
Lavalle, Maryland 21502

Phone: (301) 777-1212
Fax: (240) 362-7550


Operating Engineers Local 37, Training Site
5021 North Point Blvd.
Baltimore, Maryland 21219

Phone: (443) 242-6280
Fax: (443) 242-6283