1. ECM Consultants, Inc.
sub: Volkert, Inc.
sub: Huval & Associates, Inc.
sub: Gresham Smith
sub: GOTECH, Inc.
sub: APS Engineering and Testing, LLC
sub: SJB Group, L.L.C.
2. Royal Engineers and Consultants, L.L.C.
sub: Michael Baker International, Inc.
sub: T. Baker Smith, LLC
sub: Design Engineering, Inc.
sub: Huval & Associates, Inc.
sub: Meyer Engineers, Ltd.
3. Infrastructure Consulting & Engineering, LLC
sub: Richard C. Lambert Consultants, LLC
sub: GOTECH, Inc.
sub: Greenman-Pedersen, Inc.
sub: Modjeski and Masters, Inc.
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