Complex sentence: He moved to ASDA in 1994 and worked with Archie Norman and Allan Leighton becoming managing director of the hypermarkets division, then moved to Marks & Spencers in 2001, where he managed the M & S food division.
Split into simpler sentences: He moved to ASDA in 1994 and worked with Archie Norman and Allan Leighton becoming managing director of the hypermarkets division. King moved to Marks & Spencers in 2001, where he managed the M & S food division.