All trade contractors need to complete our Subcontractor Qualification Application to be eligible to bid on our projects and contract with Clark. Hospitals where we heal.Museums that inspire. Learn about current bid and contract opportunities available to consultants, service providers, contractors, vendors, or suppliers. The subcontractor's guide to working with Clark Construction, including their history, how to prequalify, payment tips, and more. To: Construction Vendors. Subject: Areas of consideration when submitting a Bid Proposal. Informal Bid Proposal form is attached. The form shall be completed in its entirety. Bidders are required to submit all Proposal pages with their bid.