Tier 1
A Tier 1 contractor is a construction company that has the ability to self-perform most of the required work on a project with its own employees and equipment. They also usually have a large balance sheet, can take on the project risk and major procurement functions.
A head contractor, or Tier 1 contractor, leads major engineering and project coordination, managing procurement of key equipment and services. Tier 1 companies are industry leaders, known for their expertise, quality, and delivery of landmark projects valued in the hundreds of millions or billions.