In 1956, Mallinson emigrated to the United States to join
AMP Incorporated in
Harrisburg, Pennsylvania, where he studied the magnetic properties of
ferrites. In 1962, he moved to the west coast to join Ampex Corporation in
Redwood City, California, rising to become the director of the Recording Technology Department. The department included other major contributors in magnetic recording such as
Charles Coleman and
Neal Bertram. Mallinson was called upon as an expert in the long term archival properties of magnetic tape. Also at Ampex, Mallinson developed the theory for structures with one-sided magnetic flux. In 1984, Mallinson left Ampex to become the founding director of the new Center for Magnetic Recording Research (CMRR) at
UC San Diego. He was appointed adjunct professor in 1987. By 1990, the Center boasted eight professors and 36 graduate students. Upon leaving CMRR in 1990, Mallinson taught a course on Magnetism and Magnetic Recording and also took advantage of teaching and research opportunities overseas. In 1993 and 1995, Mallinson was a visiting professor at
KTH Royal Institute of Technology in Stockholm, Sweden and was appointed permanent visiting professor in 1996. In 1994, he was a visiting professor at the
University of Twente in
Enschede,
The Netherlands. Also in 1996, he was a distinguished visiting professor,
Sony Sabbatical Chair in
Yokohama, Japan. From 1998 through 2005, he was a regular visiting professor at
Plymouth University, UK, == Books ==