Tetra Tech reported 21K in Employees for its fiscal year of 2021.


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Employees Change
AECOM ACM:US 51K 3K
ABM Industries ABM:US 124K 10K
Booz Allen Hamilton BAH:US 27.2K 1.1K
Casella Waste Systems CWST:US 2.9K 400
CECO Environmental CECE:US 730 0
Clean Harbors CLH:US 18.3K 4.8K
Dycom Industries DY:US 15.02K 748
Ecolab ECL:US 47K 3K
EMCOR EME:US 34K 1000
Exponent EXPO:US 1.22K 47
Fluor New FLR:US 40.58K 3.14K
Harsco HSC:US 12K 0
Healthcare Services HCSG:US 39.2K 5K
Heritage Crystal Clean HCCI:US 1.3K 80
ICF International ICFI:US 7.7K 200
Jacobs Engineering JEC:US 55K 0
Leidos LDOS:US 43K 4K
MasTec MTZ:US 27K 9K
Mcgrath Rent MGRC:US 1.18K 123
Mistras MG:US 5.4K 0
MYR MYRG:US 7.6K 400
Quanta Services PWR:US 43.7K 7.9K
Quest Resource QRHC:US 188 92
Rollins ROL:US 16.48K 866
SNC Lavalin SNC:CN 30.99K 6.6K
SP Plus SP:US 10.8K 2.2K
Stantec STN:CN 25K 3K
Stericycle SRCL:US 14.55K 150
Team TISI:US 5.2K 200
Tetra Tech TTEK:US 21K 1000
Us Ecology ECOL:US 3.6K 0
WSP Global WSP:CN 55.3K 8.3K