HNTB Corp., a 105-year-old infrastructure solutions firm, celebrated the 25th anniversary of its first Austin office opening on June 17. The firm opened at Sixth Street and Congress Avenue in 1994. The office is now located at 701 Brazos St., Ste. 450, Austin. HNTB founder Ernest Howard helped design the Congress Avenue bridge, which opened in 1910; his firm would go on to work on projects such as the interchanges at MoPac and Hwy. 183 and at Ben White Boulevard and I-35. 512-447-5590. www.hntb.com

Correction: This article has been updated to reflect that HNTB originally opened its Austin office at a different location than the one it is currently located in.