A company built on experience, commitment, and value.

The Abacus story began in 1944 when an entrepreneurial street car driver in Baltimore followed a dream to own his own business. 75 years later, the Abacus story is an inspirational American success story. It is a story of growth, development, evolution and business excellence.

Initially working at night, Jesse, with the support of his wife Dorothy started “Abacus Corporation” providing commercial janitorial, maintenance and painting services. When he began, the commercial cleaning industry was very small with most businesses employing full-time day cleaners. As young parents, Jesse and Dorothy were pioneers in the cleaning industry.

As the decades passed, Abacus Corporation continued to evolve and grow into one of the largest privately-held corporate services companies in America with several brands including Abacus Staffing Services, Abacus Solutions Group, Abacus Security Services and Abacus Building Services.

Today Abacus is celebrating its 75th anniversary and continues to build upon a solid foundation of resources and experience as we continue to change in providing resources in an ever-evolving economy.

We have attracted a world-class team of leaders and strategic thinkers determined to align our success with that of our clients providing mutually beneficial results. With strong financial and business resources, Abacus has enjoyed steady and consistent growth regardless of economic and market conditions.

Our teams have been successful at large and complex projects and we are prepared for continued growth and evolution.


We have over 75 years of experience


We build relationships first


We're committed to value, excellence, and service

A Commitment to Customer Service

As a family-owned company, we know that the best relationships are built on trust and commitment. Many of our customer partnerships have been in place for more than twenty years, and the average tenure of our relationships is three or four times industry averages. Our diversified customer base includes federal, state and local government entities, Fortune 500 companies, universities, hospitals, retailers, property management companies and third-party logistics providers.

An Employer of Choice

With an active role in day-to-day management, our dedicated leadership team understands what makes Abacus an employer of choice to our workers: competitive pay, financial stability, opportunities for advancement and growth as well as real, tangible benefits. Since our inception in 1944, we have provided gainful and exciting employment opportunities, nationally.

Ready to find out how Abacus can support your business needs?

We invite you to contact us online or reach out directly to a knowledgeable member of our leadership team today!

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  • “We chose Abacus to support us in our seasonal hiring initiative – we found their workforce full of energy and eager to grow. We were very happy to have hired directly 25% of the seasonal workers and look forward to their long-term contribution in our organization.”

    -Molly, Distribution Center Human Resources Director
  • “I moved to the area with my wife to support her in her new job and found myself out of work for the first time. Abacus was able, within days, to find a new role where I was able to bring my talents and grow in ways, I never imagined were possible.”

    -Mike, Baltimore, MD
  • “We have found that be counting on Abacus for our staff recruiting needs, our internal team is able to focus on our core mission and spend less time searching for qualified candidates. Our relationship manager is there for us every step of the way and we look forward to our future with Abacus.”

    -Eva, Call Center Director
  • “After my enlistment in the Air Force ended and I returned home, I found Abacus who helped me begin the next phase of my life. I was placed in a position with a Fortune 500 company and after several months I was promoted into a long-term position. I look forward to growing as a professional and bringing my experience and training to support this new mission.”

    -Andre, Atlanta, GA
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