Minority Affiliations And Certifications

Though Koch is a small business enterprise, we have many of the capabilities of large companies (years of large and small project experience and technically savvy employees) and as has been with the Hato Rey project, the ability to efficiently adapt to changing job conditions. We provide a ‘team effort’ with ‘value-added service’ as our goal! Koch has been in business since 1936 and has hundreds of successful projects completed in more than 36 states, territories and provinces.


  • Women Owned: Koch Corporation is a 90% women owned company registered as Strong Tower, LLC dba Koch Corporation with an ID of P0546193.
  • Small Business: Koch Corporation is a certified small business, Contractor.


  • 236115 Construction Management, Single-Family Building
  • 236116 Construction Management, Multi-Family Building
  • 236118 Construction Management, Residential Remodeling
  • 236210 Construction Management, Industrial Building
  • 236220 Construction Management, Commercial, Industrial Building
  • 238110 Poured Concrete Foundation, Structure Contractors
  • 238140 Masonry Contractors
  • 238150 Glass and Glazing Contractors
  • 238210 Electrical Contractors, Wiring Installation Contractors
  • 238220 Plumbing, Heating and Air Conditioning Contractors
  • 238290 Other Building Finishing Contractors
  • 238310 Drywall and Insulation Contractors
  • 238320 Painting and Wall Coverings Contractors
  • 238350 Finish Carpentry Contractors
  • 238390 Other Building Finishing Contractors
  • 562910 Remediation Services