BDO, a professional service organization, announced today that it has acquired accounting and consulting firm SS&G.

The acquisition means that BDO has expanded its Midwest presence with the addition of more than 375 staff, including 36 partners, from SS&G. SS&G provides a full range of accounting and consulting services to a diversified client base, with particular focus in the manufacturing, distribution, restaurant, healthcare, nonprofit, real estate, and technology industries.

Several SS&G partners will be taking on leadership roles at BDO. Robert Littman will join the BDO USA's board of directors, and he also will be taking on a new role at BDO as managing partner of Ohio, with all Ohio-based office managing partners reporting to him.

SS&G founders, Mark Goldfarb and Gary Shamis will also be joining BDO. Goldfarb will serve as Ohio managing partner for key client relationships and growth strategies. Shamis will serve as national strategy and growth advisor in BDO USA's national office, while maintaining his presence with Ohio clients.

The combination of BDO and SS&G is subject to customary closing conditions and is expected to be completed on Jan. 1, 2015. SS&G Wealth Management, SS&G Healthcare and Paytime Integrated Payroll Services are not part of the transaction and will continue to serve their clients as independent entities.