Magnusson Klemencic Associates is an American structural and civil engineering consulting firm with its headquarters in Seattle, Washington.

In 1929, Witt died in a railroad crossing accident and the company passed to partners Harold Worthington and George Runciman (who was referred to as "a leading structural engineer in Seattle"[2]).

[3] After the end of World War II the building industry in the United States picked up and the firm grew in size.

To date, the tallest building designed in the firm's history is the 1,808 ft Doha Convention Center Tower, currently under construction.

[14] Current Chairman and CEO Ron Klemencic received the 2018 ENR Award of Excellence for "daring to innovate, for spearheading the age of cooperative R&D and for his relentless pursuit of a better and more constructible built environment."

He serves as a director for the Charles Pankow Foundation and with a grant from them, he led the development of performance-based seismic design for structures.

MKA was given the Grand Conceptor Award for the KeyArena (1996),[17] the Seattle United States Courthouse (2006),[18] and the Olympic Sculpture Park (2008).