People: Dr. Stephen Blough, Ph.D., has joined Valentiam Group, a valuation and transfer pricing firm, as partner; Dr. Blough spent more than 25 years in the transfer pricing practice of a Big Four accounting firm, where he held numerous leadership roles … Trey Stevens, ASA, has joined New York City-based Marcum as quality control director for the firm’s National Valuation, Forensics, and Litigation Services (VFLS) practice; in this role, he monitors and updates national quality control policies, procedures, and standards, and he is the national peer reviewer of valuations Marcum professionals perform.

Firms: Private equity firms Hellman & Friedman and Valeas Capital Partners have made a strategic investment in Baker Tilly US; the two firms will take an equity stake of approximately $1 billion for just over half of the firm … New York City-based Marcum has added Powers & Sullivan of Wakefield Mass., a firm that specializes in auditing governmental entities and also offers accounting and management consulting … New York City-based Citrin Cooperman has acquired Keefe McCullough & Co. of Fort Lauderdale, Fla., a full-service tax, attest, and business advisory firm … Cleveland-based CBIZ announced it has acquired tax and accounting service provider Erickson Brown & Kloster of Colorado Springs, Colo.

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