After spending his entire 52-year career at Brinks, Hofer, Gilson & Lione, name shareholder Roy E. Hofer resigned from the firm today. The move follows a nearly two-year dispute between top management and four longtime lawyers. Officials led by President James R. Sobieraj proposed cutting costs by shifting a group of senior shareholders above age 65 off the firm’s basic health insurance plan, Hofer said. “The firm’s current management has adopted a new firm culture that is inconsistent with my …