Jonathan Loflin, 38, brings quantitative chops to his role as a portfolio manager with hedge fund firm Mariner Investment Group: He holds bachelors degrees in finance and computer science and a masters in engineering from the Massachusetts Institute of Technology. Loflin, whose father served in the U.S. Air Force, began his financial career in 1999, in the quantitative strategies group of Goldman Sachs Group. In 2005 he left Goldman for BlueMountain Capital Management, the New Yorkbased credit- and credit-derivatives-focused hedge fund firm, where his duties included serving on the management committee. Loflin subsequently worked as a portfolio manager for Wells Fargo & Co. in San Francisco before returning to New York this year to join $11 billion Mariner on its incubation program. His relative-value strategies in equity, foreign exchange and commodity derivatives seek to produce an all-weather, market-neutral return stream useful in portfolio construction and diversification.