SDI utilizes the following contractors.

Brewer Garrett
Chemstress Construction Co.
CR Construction
Davis Construction Management
DMW Construction
Donley’s Inc.
Geis Construction
Glasrock OMI
Great Lakes Construction
A.M. Higley Company
Independence Excavating
Industrial First
Infinity Construction
Jones Lang LaSalle
KBJ Incorporated
Kelley Steel Erectors
Kelly Construction
Ketchum & Walton Co.
Kokosing Construction Co.
Krill Co.
McMeechan Construction
McTech Corporation
Middough Construction
Mr. Excavator
Norris Brothers Co. Inc.
Precision environmental
Precise Construction Inc.
Property Management Inc.
R G Smith Co., Inc.
Ruhlin Construction Co.
Schad Refractory Construction
Schirmer Construction LLC
Shippers Highway Express, Inc.
Shook, Inc.
Standard Contracting & Engineering
Superior Industrial Insulation
URS Energy & Construction
Warren Roofing
Whiting Turner Contracting Co.
Wojcik Builders
Workman Industrial Services Inc.