p>Knowledge of: Operations, services, and activities of a purchasing program; principles of lead supervision and training; commodity markets, market practices, and commodity pricing methods; modern and complex principles, procedures, methods, and legal requirements of purchasing; complex analytical methods and procedures; methods and practices used in competitive bidding; complex product, service, and equipment specification analysis and development; current market conditions, trends, and sources of supply; accounting and receiving principles; office procedures, methods, and equipment including computers and applicable software applications such as word processing, spreadsheets, and databases; pertinent federal, state and local laws, codes, and regulations. This position will lead, oversee, and participate in the more complex and difficult work of staff responsible for performing a variety of professional level duties involved in the procurement of quality services, equipment, and supplies at cost effective rates as required and requisitioned by City departments; to perform highly complex research and analysis for special projects involving procurement activities and/or development of policies and procedures; and to perform a variety of technical tasks relative to assigned areas of responsibility.