Mok graduated from the ArtCenter College of Design in 1980. His first job was at the advertising and marketing department of CBS. Tom Suiter, Apple Computer's creative director at the time, tried to recruit Mok, who initially declined. However, Mok reconsidered when he saw co-founder Steve Jobs on the cover of Time magazine.
Mok was hired by Apple Computer in 1982 as the art director for the Macintosh 128K product launch team. His packaging designs included the original packaging of MacPaint and MacWrite. John Casado was hired to create the Macintosh "Picasso" logo. In 1985, he became co-manager of the Creative Services department and was responsible for all Macintosh promotion, along with corporate and educational marketing.
After leaving Apple Computer in 1988, Mok was responsible for designing logos and packaging for clients such as 3Com, Claris, Farallon, GO Corporation, MacroMind, and The Mirage Resort & Casino. His design studio became Studio Archetype, which was acquired by Sapient in August 1998. Mok then became the Chief Creative Officer of Sapient.
- Success Ideas and Tips from Master Graphic Designer, Clement Mok, The Sherwood Group. 2010-09-21.
- Apple's origins: An oral history from inside the loop by Shara Tibken, CNET. 2019-04-01.
- Clement Mok by Ed Kashi, Forbes. 2012-10-06.
- Sapient Corp. buys Studio Archetype, AdAge. 1998-08-26.