Tetra Tech, Inc. provided earnings outlook for the fourth quarter and full year of 2021. For the quarter, the company expects EPS in range from $0.95 to $1.00 and net revenue to range from $650 million to $700 million. For the full year, the company now expects EPS to range $3.69 to $3.74, and net revenue to range from $2.50 billion to $2.55 billion.