EX-21.1 4 f10k2019ex21-1_atlastech.htm SUBSIDIARIES OF THE COMPANY

Exhibit 21.1

List of Subsidiaries

Subsidiaries

Name

Jurisdiction of Incorporation

Atlas TC Holdings LLC Delaware
Atlas Intermediate Holdings LLC Delaware
Atlas Technical Consultants Sole Member LLC Delaware
Atlas Technical Consultants LLC Delaware
ATC Sole Member LLC Delaware
Arrow Environmental Holdings GP LLC Delaware
Arrow Environmental Holdings LP Delaware
ATC Group Partners LLC Delaware
ATC Group Holdings LLC Delaware
ATC Group Services LLC Delaware
Sage ATC Environmental Holding LLC Delaware
Sage ATC Environmental Consulting LLC Delaware
Dexter ATC Field Services LLC Delaware
Atlas TC Buyer LLC Delaware
Arrow ATC Holdings LLC Delaware
ATC Group Services (CA) Inc. Delaware

ATC Group Services (CT) Inc.

Delaware

ATC Group Services (MA) Inc.

Delaware

ATC Group Services (MI) LLC

Delaware
Long Engineering, LLC Delaware

ETS-ESC Holdings LLC

Delaware
PIEDMONT GEOTECHNICAL CONSULTANTS, LLC Delaware
ATC Associates of North Carolina, P.C. North Carolina
ATC Engineering, LLP New York
Atlas ATC Engineering Inc. New York
PAVETEX Engineering, LLC

Texas

SCST, LLC California
Engineering & Testing Services, LLC California
CEL Consulting, LLC California

Southwest Geophysics, LLC

California

Quality Assurance Engineering, Inc.

California

United Testing, LLC

California

HES Testing, LLC

California
Caitcon, LLC California

Geosphere Consultants, Inc.

California

Materials Testing & Inspection, LLC

Idaho

Engineering Services, LLC

Idaho