American Mechanical Services

Holmes Mechanical Contractors (HMC) is an independent, family-owned and operated small business with over 40 years of experience in providing innovative solutions for government, commercial, and industrial infrastructures in the Washington, DC-Maryland-Virginia metropolitan area. Led by Founder and CEO Ronald E. Holmes, Sr., HMC is a world-class competitor in the prime and subcontract market, offering a wide range of expertise in general contracting, HVAC design and installation, energy technology, and facility operations and maintenance services. With a team of certified technicians and facility operators, HMC aligns itself with industry trends and maintains up-to-date licenses and certifications to ensure effective results. As an 8(a) Diversity Supplier and Veteran-Owned Business, HMC collaborates with federal, state, and local jurisdictions as a regional MBE DBE SBE firm, serving prestigious clients such as The White House, U.S. General Services Administration, U.S. Food and Drug Administration, and many more. Celebrating over forty years of mastery, HMC is committed to delivering tested performance and total assurance in every project.Generated from the website

Shapiro & Duncan is the culmination of three generations of plumbers and mechanical contractors. In the mid-1930s Jake Shapiro started J. Shapiro Plumbing & Heating in Washington, D.C. After Jake retired, his son, David, a mechanical engineer, organized a mechanical contracting company in 1976 known as Shapiro & Duncan. In the early 90s, David s sons, Jerry and Sheldon, assumed operation of the company. Shapiro & Duncan continues to complete renovation projects but has added new construction, office buildings, government and industrial development projects to its portfolio. It has completed nearly 2,000 projects through the years. The main office in Rockville houses the management, including information technology, purchasing, education, safety, accounting and human resources and construction groups, including estimators, project managers and support personnel, the service department and design-build teams. The fabrication shop is in Beltsville, Md.