JACKSON, Mich. & NEW YORK–(BUSINESS WIRE)–Commonwealth Associates, Inc. (“Commonwealth” or the “Firm”), a leading pure-play power engineering firm, and New Mountain Capital, LLC (“New Mountain”), a leading growth-oriented investment firm, today announced a majority investment from funds managed by New Mountain to support the Firm’s continued growth amid increasing demand for electricity and investment in power infrastructure. Commonwealth also announced the appointment of Dr. Hisham Mahmoud t