Mr. O'Brien is an equity member in the firm's non-bankruptcy litigation department and one of the original founders of the firm. Mr. O'Brien is a litigation and legal cousnelor who has represented governments, financial institutions, commercial developers, and other institutional clients. He also acts as general counsel for several of his financial clients. Mr. O'Brien has been involved in complex litigation in state, federal, and appellate courts.

Early on Mr. O'Brien maintained an active criminal, financial, and domestic relations practice. As the institutional portion of his business expanded, his emphasis shifted to his government, financial, and commercial development clients exclusively. Mr. O'Brien has also developed a successful catastrophic personal injury practice with several seven-figure results. Mr. O'Brien's litigation practice has involved numerous litigation strategies, primarily in the defense of the firm's clients, encompassing extensive and complex discovery, dispositive motions, trial preparation, and ultimately trial. Mr. O'Briens financial clients also rely on him for strategic, legal, and business advice as general counsel, which permits him to take an active role in the day-to-day operation of his financial clients' business.