Why choose OSI?

Pioneers of Innovation, Champions of Efficiency, Masters of Variety.

1627 and 1629 K st are two blocks from the white house and a block from Farragut Square metro. You are in the central business district and a DC Hubzone.
OSI, established in 1981 under Washington Office, Inc., holds the distinction of being the oldest continuously operated business center in the United States under single ownership. Founded by C. Jack Pearce, an experienced anti-trust attorney with a background in the U.S. Department of Justice and the White House Office of Consumer Affairs, OSI initially catered to out-of-town attorneys. It quickly expanded its services to include Washington area attorneys and diversified to support businesses of all types, from startups to established companies.

OSI offers more than just a prestigious business address on K Street, near the White House and major subway lines. Our service plans include on-site office access, mail scanning and emailing, immediate notification for visitor arrivals, and assistance in obtaining a DC business license. Our customer portal facilitates easy account management, networking opportunities with other OSI clients, and the ability to tailor services as your business evolves.

Our offerings have grown from our origins as one of the first 'virtual offices' to include full-time, exclusive use office spaces. In partnership with Source Office Suites, OSI extends its services across the Washington metropolitan area, providing a variety of office solutions that adapt to mobile, branch, home, or traditional office operations.

Located at the strategic Farragut Square, near the White House, OSI's enduring commitment to economical and efficient service has established it as a unique provider in the heart of the nation’s capital. We invite you to explore testimonials from our valued clients and discover the diverse services OSI has to offer.