Unisys has appointed David Barnes as managing director for Australia and New Zealand. Barnes will also hold an operational role within the company’s overall Asia Pacific region. Barnes joins Unisys from SAP where his most recent role was chief operating officer for Europe, the Middle East and Africa. His other roles at there included chief financial officer in various geographies, including New Zealand and Australia. Meanwhile, Unisys' global CEO, Joseph McGrath, has announced his resignation. McGrath, who has been in the top job since 2005, will continue to run day-to-day operations until a successor is found.