Natalie Tronkina has joined CohnReznick, Los Angeles, as director in its Transactional Advisory Practice. Tronkina will work with the newly appointed principal Margaret Shanley, to build the firm’s West Coast Transactional Advisory Practice. Tronkina joins CohnReznick from Duff & Phelps, where she spent almost seven years as a director in the West Coast Transaction Advisory Practice. She has more than ten years of transactional advisory experience, focused primarily on “buy” and “sell” side due diligence for private equity funds, lenders, and strategic buyers and sellers. … Sam Levin has joined RBZ LLP, Los Angeles, as partner in the business management practice. … Ellyn Cole has been promoted to senior manager at Bartlett, Pringle and Wolf LLP, Santa Barbara. Cole was also honored by the Pacific Coast Business Times as one of the 2013 40 Under 40 up-and-coming business leaders within the San Luis Obispo, Santa Barbara and Ventura region of California.