Seattle-based CPA firm Peterson Sullivan LLP this week announced it will combine with the Seattle office of Anderson ZurMuehlen & Co. PS, an accounting and business advisory firm based in Montana. The two Seattle firms will operate as Peterson Sullivan LLP effective November 1.

CPA and business advisory firm SS&G recently announced the completion of a merger with Chicago-based Ahlbeck & Company. The merger adds 22 staff members to SS&G's roster of more than 400 employees.

Following is the latest roundup of firm news for the week of October 18, 2010.

CPA societies in Illinois and Virginia provided the impetus for firms and individuals nationwide to take part in a day of service on September 24, the CPA Day of Service. The event not only helps worthy local organizations, but also highlights the contributions made by CPAs.

Students around the world have placed the Big Four accounting firms atop a ranking of the world’s top 50 most attractive employers, bested only by Google in the coveted No. 1 spot.

Local accounting firms Thomas R. Haggerty CPA, PC, and Lewis & Knopf CPAs, P.C., recently announced a merger. The merged firm, which became effective September 27, will be recognized as Lewis & Knopf CPAs, P.C.

Every year, INSIDE Public Accounting’s Best of the Best recognition honors 25 firms for their stellar management and superior operational performance on more than 50 criteria.

PricewaterhouseCoopers LLP (PwC) - the Big Four tax, audit and advisory services firm with global headquarters in London and U.S. headquarters in New York - introduced a new visual identity during a relaunch of its Web sites.

Following is the latest roundup of firm news for the week of September 13, 2010.