The company had 2018 annual revenue of more than $5 billion,[2] and is one of the largest commercial and civil contractors in the country.

[4] The company began doing construction work in 1923; its first such contract was with Wheatley Junior High School.

The company was involved in numerous military construction projects during World War II.

[5] In 1969, A. James Clark bought the company from the Hyman family[6] and oversaw major growth including one of its earliest projects L'Enfant Plaza in Washington.

[5] In 2016, a year after Clark died, firm management bought the company from its parent Clark Enterprises, leaving the parent to concentrate on its private equity, financial and real estate markets.