Accounting and business consulting firm Hill, Barth & King, has acquired Carson & Co. LLC, CPAs, of Sewickley, Pa., expanding the firm’s presence in Pennsylvania and construction industry clientele.

Chris Allegretti

The acquisition, which takes effect immediately, was announced last Friday. Financial terms were not disclosed. HBK ranked 85th on Accounting Today’s 2011 list of the Top 100 Firms, with $33.5 million in annual revenue.

As part of the deal, John Mavero, a partner at Carson, will be joining HBK as a principal. Some of the staff from his firm will remain in their current offices in Sewickley while others will join HBK’s office in Wexford, Pa., near Pittsburgh.

“We are excited about combining our resources with HBK,” Mavero said in a statement. “We sought to integrate with a firm that could offer the resources to meet our growing clients’ needs, and we are confident that we will be able to provide a wide variety of services that will deliver additional value to our clients.”

HBK managing principal and CEO Chris Allegretti noted that Carson & Co. has years of experience in the construction industry, along with extensive audit and tax knowledge. “We look forward to making available the full range of HBK expertise and services to Carson & Co. clients,” he said.

He added that Carson & Co. clients would also be able to take advantage of his firm’s investment advisory arm, HBKS Wealth Advisors, which offers personal financial planning, asset management services, estate planning, retirement planning, pensions, financial education and asset protection services.

With the addition of Carson & Co., HBK and HBKS Wealth Advisors employ over 300 professional and support staff. Besides Pennsylvania, the firm also has offices in Ohio and Florida, and is based in Boardman, Ohio.