The Supplier Diversity Office (SDO) continues its rich and long tradition of service to minority and women owned businesses in the Commonwealth of Massachusetts. In addition to its service to minority and women business enterprises, the SDO has the responsibility to certify businesses that meet certain criteria. SDO certification is a marketing tool used to enhance a firm's ability to do business in public markets. Although certification does not guarantee that a business will be successful every time it bids, it may add a competitive edge to a bid. The Commonwealth of Massachusetts spends more than $4 billion each year doing business with firms. More than $240 million of this amount is targeted to SDO certified minority and women businesses. Becoming SDO certified can help firms seeking contracts with the government.