J.F. Lehman & Company, an alternative asset manager focused on the aerospace, defense, government, maritime, environmental and infrastructure sectors, has announced that investment affiliates, including JFL Equity Investors VI, L.P., have acquired Forged Solutions Group, Inc. (FSG).With roots dating back to 1836, FSG is a provider of high specification forgings for the aerospace, defense, and space end markets with a particular focus on flight-critical, rotating aeroengine components.