Global professional services firm Alvarez & Marsal announced the addition of Russell Kellner to its private equity services group as a managing director based in Boston. He will focus on pre-acquisition diligence support and operational improvement.

Prior to joining A&M, Kellner was a principal at Bain & Company and a leader in the firm’s private equity group where he oversaw more than 80 commercial due diligence projects on prospective investments with analyses including market sizing and growth, competitive positioning, and performance improvement opportunities.

Kellner has also worked at First Manhattan Consulting Group, was a cofounder of Novantas and worked as an investment banker in Goldman Sachs’ Financial Institutions Group.

Kellner has experience in performance improvement and due diligence across industries, including financial services, business services, healthcare, technology, media and industrial goods and services. He has also worked on a variety of business unit and corporate strategy projects for clients, including portfolio strategy, technology strategy, product-line profitability, customer segmentation, marketing strategy, M&A and post-merger integration.

A&M’s private equity services professionals work with investors and their portfolio companies to provide independent analysis and end-to-end services across the investment lifecycle that deliver results in every economic cycle.