Twin Disc Inc. has announced numerous changes in senior management. Jim Feiertag is the new executive vice president with responsibility for the North American manufacturing operations and global sales/marketing activities for the industrial and transmission product lines. John Batten is the executive vice president of Europena operations. Dean Bratel is now vice president, engineering and member of the management executive committee. He has held a variety of engineering management positions within Twin Disc since starting with the company in 1987. Denise Wilcox was elected vice president of human resources and a member of the management executive committee. Twin Disc designs, manufactures and sells heavy-duty off-highway power transmission equipment.