Subsidiary

Registered Jurisdiction

3D/International, Inc.

Texas

Amplus Corporation

Virginia

Blackhorse, A Parsons Company

Delaware

Bonifica S.P.A.

Italy

Braxton Science & Technology Group, LLC

Colorado

Braxton Technologies, LLC

Colorado

Bright Star For Engineering Services LLC

Iraq, Republic of

Checkmark Vehicle Safety Services, Inc.

Delaware

CMX Technologies LLC

Delaware

Command Engineering International Limited

Ontario

De Leuw, Cather International Limited

Delaware

Delcan Corporation

Illinois

Delcan Technologies, Inc.

Georgia

DZSP 21 LLC

Delaware

Echo Ridge, LLC

Virginia

Emerett, LLC

Colorado

First Defense Services Pte. Ltd.

Singapore

Fourth Dimension Engineering LLC

Delaware

Holding S.r.L.

Italy

Ingenicomm, LLC

Virginia

IPKeys Power Partners, Inc.

Delaware

Marigold Infrastructure Partners Inc.

Alberta

NDP, LLC

Colorado

OGS Holdings, Inc.

Delaware

OGSystems, LLC

Virginia

PARCAN, Inc.

Delaware

Parmetek, S.A. De C.V.

Mexico

Parsons 401Hot GP Inc.

Ontario

Parsons 401Hot Limited Partnership

Ontario

Parsons Architectural Services Inc.

Alberta

Parsons Architectural Services of Illinois Inc.

Illinois

Parsons Architecture of Florida Inc.

Florida

Parsons Architecture of New Jersey P.C.

New Jersey

Parsons Canada Holdings, LLC

Delaware

Parsons Construction Craft Services Inc.

Texas

Parsons Construction Group Inc.

Delaware

Parsons Constructors & Fabricators Inc.

Delaware

Parsons Constructors Inc.

Delaware

Parsons Corporation

Delaware

Parsons Delcan Inc.

Delaware

Parsons do Brasil Construcoes Ltda.

Brazil

Parsons Engineering Inc. of Michigan

Michigan

Parsons Engineering Limited

Cork

Parsons Engineering of New York, Inc.

New York

Parsons Engineering Science International, Inc.

Delaware

Parsons Engineering Science, Inc.

California

Parsons Engineering Services L.L.C.

Dubai

Parsons Enterprises, Inc.

Delaware

Parsons Environment & Infrastructure Group Inc.

Delaware

Parsons Europe Holdings B.V.

Netherlands

Parsons Evergreene, LLC

Delaware

Parsons Federal Construction Inc.

California

Parsons Global Services, Ltd.

Cayman Islands (B.W.I.)

Parsons Government Services Inc.

Nevada

Parsons Government Services International Inc.

Delaware

Parsons Government Support Services Inc.

Texas

Parsons Group International Limited

United Kingdom

Parsons Group-France SAS

France

Parsons Hanford Fabricators Inc.

Washington

Parsons Inc.

Federally Chartered

Parsons Infrastructure & Technology Group Inc. of Ohio

Ohio

Parsons Infrastructure & Technology Group of Illinois P.C.

Illinois

Parsons Infrastructure & Technology Group of Michigan Inc.

Nevada

Parsons Infrastructure & Technology Group of New York Inc.

New York

Parsons Inspection & Maintenance Corporation

Delaware

Parsons International & Company LLC

Sultanate of Oman

Parsons International Limited

Nevada

Parsons International Limited

Delaware

Parsons International Limited (L.L.C.), a Limited Liability Company

Egypt, Arab Republic of

Parsons Main of New York, Inc.

New York

Parsons Main, Inc.

Massachusetts

Parsons Middle East Corporation

Nevada

Parsons Middle East Ltd.

Delaware

Parsons MIP Inc.

Alberta

Parsons of North Carolina Inc.

North Carolina

Parsons of Puerto Rico Professional Engineers, P.S.C.

Puerto Rico

Parsons Overseas Company

Nevada

Parsons Overseas Limited Inc.

Delaware

Parsons PATCO Inc.

Delaware

Parsons Professional Corporation

District of Columbia

Parsons Professional Services Inc.

Ontario

Parsons Project Services, Inc.

California

Parsons RCI Inc.

Washington

Parsons Savannah Construction Company

South Carolina

Parsons Savannah Services Company

Delaware

Parsons Secure Solutions Inc.

Virginia

Parsons Services Company

Texas

Parsons SGTP GP Holdings Inc.

Federally Chartered

Parsons Technical Services Inc.

Delaware

Parsons Technical Services International Inc.

Texas

Parsons Technologies, LLC

Delaware

Parsons Transportation Architectural Services LLC

Delaware

Parsons Transportation Group Inc.

Illinois

Parsons Transportation Group Inc. of Michigan

Michigan

Parsons Transportation Group Inc. of Virginia

Virginia

Parsons Transportation Group of New York, Inc.

New York

Parsons Transportation Group, Professional Corporation

District of Columbia

Parsons Water & Infrastructure Inc.

Delaware

Parsons-Versar LLC

Delaware

Partnership for Temporary Housing LLC

Delaware

Polaris Alpha Advanced Systems, Inc.

Virginia

Polaris Alpha Cyber and Sigint, LLC

Delaware

Polaris Alpha Cyber Technologies, LLC

Delaware

Polaris Alpha Equity Holdings, LLC

Delaware

Polaris Alpha Holdings Parent, LLC

Delaware

Polaris Alpha, LLC

Delaware

PTSI Managed Services Inc.

California

QRC, LLC

Virginia

RMP Infrastructure Holdings Inc.

Federally Chartered

S&P Geology Services P.C.

New York

Sage Management Enterprise, LLC

Maryland

Saudi Arabian Parsons Limited

Saudi Arabia

Sealing Technologies, LLC

Maryland

SGTP Highway Bypass GP Inc.

Saskatchewan

SGTP Highway Bypass Limited Partnership

Saskatchewan

Solidyn Solutions, LLC

Delaware

Space Ground System Solutions, Inc.

Florida

SPW 2020 LLC

Virginia

Steinman Boynton Gronquist & Birdsall

New York

Steinman Inc.

New York

T.J. Cross Engineers, Inc.

California

Tailored Engineering Deployments, LLC

Maryland

TCG International Group Ltd.

Virginia

The Ralph M. Parsons Company

Nevada

TSM LLC

Tennessee

Vaxcom Services LLC

Delaware

West Corridor Developers General Partnership

Alberta

Williams Electric Co., Inc.

Florida

Xator AFG LLC

Delaware

Xator LLC

Florida