04:26 PM EDT, 10/07/2025 (MT Newswires) -- Tetra Tech (TTEK) said late Tuesday that Roger Argus is being promoted to president, and Jonathan Weiss will be appointed president, commercial/international services group, as it begins fiscal year 2026.

Argus is currently executive vice president of corporate development and president of the commercial/international services group, the company said.

Weiss brings over 30 years' experience at Tetra Tech, leading operations across both federal and commercial markets, it added.