Warren R. Knipple was recently named president of US operations for Trotec Laser Inc., a Ypislanti, Mich., laser cutting, marking and engraving company. Knipple was formerly chief financial officer at Windows Holding Corp. and was previously chief financial officer then vice president at Telesis Technologies Inc. During his 20-year career he also worked for Stanley Air Tools Product Group, was part of the Sportomotive Business Team at Rubbermaid's Seasonal Products Div., and was employed in the Champion Spark Plug division of Cooper Industries. He has a BBA from the University of Toledo and an MBA from the University of Michigan.