How do I bid on a City of Dallas contract? For information on the bidding process, please contact the City of Dallas Procurement Services at: (214) 670-3326.City of Dallas, TX , TX is looking to buy goods and services. Discover all bid opportunities, RFPs, and government contracts with City of Dallas, TX. Click the link to access the sourcing platform and review your bid opportunity. The sourcing number is required to access the bid. Discover what a bid proposal is, the elements of a bid proposal, how to create one and a template and example that can guide you.