Diamond Unlimited, Inc. is a heavy, civil, earthmoving contractor with 30 years of experience in the Chicagoland area. We specialize in construction and maintenance at chemical and petroleum refineries, wastewater treatment plants and power generating/distributing facilities. We also perform private work for hospitals and commercial developments as well as public work for schools and municipal sites. Diamond has built its reputation as a specialty civil contractor on reliability, safety, integrity and project execution. It has been a privilege to partner with our clients to provide quality service with attention to sensitive existing operations while completing projects cost-effectively and efficiently.
Our successfully completed contracts reflect the large spectrum of the types of work we perform. Our work capabilities include, but are not limited to...
* Sitework * Site utilities * Excavation and backfill * Rock excavation * Underground piping * Roadwork * Special waste removal * Industrial maintenance * Demolition
Diamond Unlimited, Inc. is a union shop signatory to...
International Union of Operating Engineers Local 150
Teamsters Local 179
Laborers International Union of North America Local 75
Also, we have performed work under the National Maintenance Agreement, the Powerhouse Maintenance Agreement, and Pipeline Agreements.
Diamond is honored to be members of the Three Rivers Manufacturing Association (TRMA), Building Trades Association, Lake County Contractors Association, and the Will Grundy Contractors Association.
