Your bid proposal should clearly express your interest in and highlight your suitability to the project you are bidding on. A bid proposal is very specific summary of telling why you are eligible to get the job.Proposal writing is a lucrative market for freelancers, if you know how to play the game. Here's what you need to know to land these writing jobs: The City of San Diego provides you with direct access to bidding and contracting opportunities on all its construction projects. It can be hard to stand out from the crowd, but follow these tips to write an attentiongrabbing bid. Public Works Contracting. It outlines the freelancer's understanding of the project, their approach to completing it, and the terms under which they are willing to work.