Mr. Wishart serves as an advisor to various technology companies and venture capital firms.  He previously served as chief executive officer and as a director (from 2015 to 2025) of efabless corporation, an early-stage company offering an open platform and marketplace for community-based design of custom semiconductors, which Mr. Wishart co-founded in 2014. Mr. Wishart previously served as a managing director and advisory director of Goldman, Sachs & Co. from 1999 until he retired in 2011.  From 1991 to 1999, he served as managing director, including as head of the global technology investment banking group for Lehman Brothers. From 1978 to 1980 and from 1982 to 1991 he held various positions in the investment banking division at Smith Barney, Harris Upham & Co. In addition, Mr. Wishart is a venture partner at Tyche Partners, a venture capital firm focused on hardware-related companies, since 2015.

Mr. Wishart served on the board of directors of Spansion Inc. from 2013 until 2015 and of Cypress Semiconductor Corporation from 2015 until 2020.