• CMI Certified

    CMI is a professional society focused on education, training and career improvement for commercial cleaning professionals. Since 1964, CMI has been helping frontline custodians, supervisors and custodial trainers to achieve their career goals and reach their potential.

  • Office Of Minority Business Enterprise

    The Maryland Department of Transportation's (MDOT) Office of Minority Business Enterprise (OMBE) is Maryland's official certification agency for the Minority Business Enterprise (MBE) Program, the Disadvantaged Business Enterprise (DBE) Program, the Airport Concessions Disadvantaged Business Enterprise (ACDBE) Program, and Small Business Enterprise (SBE) Program. We ensure only bona fide MBEs/DBEs/ACDBEs and SBEs participate in our program through our comprehensive certification program. Additionally, certified firms appear in MDOT's Online Directory of Certified Firms.

  • NMSDC Certified

    The National Minority Supplier Development Council Inc ® (NMSDC®) is one of the country’s leading corporate membership organizations. Whether you’re a small minority-owned organization or a billion dollar powerhouse, we’re committed to helping you solve the growing need for supplier diversity.

  • Certified Business Enterprise Program

    A Certified Business Enterprise (CBE) is a business that is headquartered in the District of Columbia and has been certified by the Department of Small and Local Business Development (DSLBD). Businesses with CBE certification receive preferred procurement and contracting opportunities.

  • APPA Certified

    The association is known as APPA: Leadership in Educational Facilities, and is most easily recognized and referred to as simply “APPA.” With one eye on providing excellence in today’s educational environment, and one always trained on adapting, enhancing, and transforming the facilities of the future, APPA seeks to create positive impact in educational facilities on three important levels.

  • DC Department of Small & Local Business Development

    The Department of Small and Local Business Development (DSLBD) supports the development, economic growth, and retention of District-based businesses, and promotes economic development throughout the District's commercial districts.

  • DMBE

    The mission of the Department of Small Business and Supplier Diversity is to promote access to the Commonwealth of Virginia’s contracting opportunities and ensure fairness in the procurement process. SBSD has two key goals: (1) increase the number of certified businesses in the Commonwealth, and (2) increase the total dollars allocated to SWaM vendors as a percentage of all discretionary spend or contract dollars. For a more detailed look at SBSD’s performance measures, visit the Commonwealth’s VA Performs website at www.vaperforms.virginia.gov and go to SBSD’s performance measures.

  • DBE Certified

    To be certified as a DBE a firm must be small business owned and controlled by socially and economically disadvantaged individuals.


I have consistently been impressed by the support and service provided by NSC and its’ team of custodial and facilities maintenance personnel. In an era where customer service has all but disappeared, the work that NSC and its’ employees do should be held up as an example for others to attempt to emulate.

Terry B.

Curtis Properties

The NSC staff from top to bottom is enjoyable, the employees are professional and are always responsive to our needs.

Usha J.

Howard Road Academy

NSC is an excellent service provider their customer service is as exceptional as their quality of work.

DC Public Libraries