He will succeed Paul Auvil, who will remain with the company as a board member, Quantum said Monday.
Rau previously led SeaChange International as CEO and held various leadership roles at Motorola such as senior vice president of mobile video solutions; corporate vice president of global marketing and strategy; and vice president of strategic business planning.
San Jose, California-based Quantum intends to re-establish its Corporate Governance and Nominating Committee that will include Rau, Clifford Press and Alex Pinchev.
Quantum also signed a letter of intent to engage business advisory firm AlixPartners in financial improvement efforts.
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