Third party recruiters and agencies should not contact employees of Tetra Tech or its subsidiaries directly. Any resumes sent to a hiring manager or submitted to Tetra Tech’s career portal are considered unsolicited and property of Tetra Tech. Tetra Tech will not pay a placement fee unless the agency or recruiter has a signed contract with Tetra Tech’s Human Resources department in advance of submitting a candidate for consideration. Verbal and written approvals will not be considered a valid contract for service.