To: Construction Vendors. Subject: Areas of consideration when submitting a Bid Proposal.The subcontractor's guide to working with Clark Construction, including their history, how to prequalify, payment tips, and more. All trade contractors need to complete our Subcontractor Qualification Application to be eligible to bid on our projects and contract with Clark. Office and mixed-use projects require the dedication of a creative, collaborative and energetic team to deliver a facility that exceeds.