1923 – 2023

Celebrating a Century of People, Projects, and Partnerships

100 Years of
Responsive People | Creative Solutions

Our cornerstones have empowered us to deliver exceptional results for our clients for a century.

Humble Beginnings

The year 1923 was an active one for beginnings. The original Yankee Stadium opened. The first issue of Time magazine came off the press. Disney Studios began filming. The Hollywood sign was erected, and Charles Lindbergh took his first plane flight. That same busy year an engineer in two rooms in a Baltimore townhouse launched a new civil engineering firm. What was started as a small firm by Richard Sandlass, then joined by George Wieman, enjoyed steady growth over the decades and evolved to become Rummel, Klepper and Kahl in 1951.

Now known as RK&K, our success is rooted in the culture and values enacted by those early leaders. RK&K has always been a firm dedicated to the concept of collaborative teamwork, professional excellence and unsurpassed quality and service for the client. The RK&K Way has proven a successful strategy for a century.

Notable Moments in RK&K’s History

Sandlass & Wieman Consulting Structural Engineers Opens
Richard Charles Sandlass (left) and George Arnold Wieman (right) started Sandlass & Wieman Consulting Structural Engineers in 1923 in Baltimore, Maryland.

Richard Charles Sandlass & George Arnold Wieman open “Sandlass & Wieman Consulting Structural Engineers” at 107 W. Saratoga Street in Baltimore, Maryland.

Edward “Ed” Frank Rummel hired
Edward “Ed” Frank Rummel was hired in 1936. He helped form the partnership known today as RK&K.

Sandlass, Wieman & Associates hire Edward “Ed” Frank Rummel.

Howard Schaefer Klepper hired
Howard Schaefer Klepper hired

Sandlass, Wieman & Associates hires Howard Schaefer Klepper.

Sandlass, Wieman & Associates Move to Larger Offices
Due to the growth of the firm, Sandlass, Wieman & Associates move company headquarters to larger offices in Baltimore’s Mt. Vernon neighborhood.

Sandlass, Wieman & Associates move to larger offices at 1021 N Calvert Street in Baltimore, Maryland.

William “Bill” Kahl hired
William “Bill” Kahl was hired in 1947. He helped form the partnership known today as RK&K.

Sandlass, Wieman & Associates hires William “Bill” R. Kahl.

RK&K’s Modern-Day Chapter Begins
Rummel, Klepper, & Kahl Painting

Sandlass, Wieman & Associates formally changes name to Rummel, Klepper & Kahl (RK&K).

RK&K Expands to Larger Location
Following several booming decades, RK&K’s growth led the company to move its headquarters to 81 Mosher Street in Baltimore. (The building is now part of the Maryland Institute College of Art (MICA) campus)

RK&K’s growth as a firm through the 1950s, 1960s, 1970s, and 1980s with new offices in several states spurred the move of our headquarters to larger offices in Baltimore.

RK&K Moves to Present-Day Location
Candler building in Baltimore, Maryland

As RK&K expanded throughout the Mid-Atlantic, Southeast, and South Central United States, and its employees grew, the company relocated its headquarters to its present-day location along Baltimore’s Inner Harbor.

Present Day
RK&K employs 1,500 people with offices located strategically throughout the Mid-Atlantic, Southeast, and South Central United States.

RK&K employs nearly 1,500 people with offices in 12 states and the District of Columbia.

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