Contracts and Purchasing Oklahoma Department of Central Services (DCS) (Link opens in new window) The Department of Central Services assists customers in accomplishing their missions by providing essential services and quality solutions through: procurement, facilities, real estate, construction, fleet, risk management; property reutilization; printing and distribution. Department of Central Services - Central Purchasing (Link opens in new window)  Provides information, specifically, on the Central Purchasing Division of the Department of Central Services. Department of Central Services - Central Vendor Registration (Link opens in new window) Direct interested parties to the vendor registration instructions within the Department of Central Services. Department of Central Services - Central Purchasing Open Solicitations (Link opens in new window) Site is for open solicitations for all state agencies are available. Department of Central Services - Central Purchasing Closed Solicitations (Link opens in new window) Site with closed solicitations for all state agencies are available. Department of Central Services Central Purchasing FAQs (Link opens in new window) Provides most frequently asked questions regarding the solicitation process with the State of Oklahoma.