Sharon Williamson begun her working life as a Banker at Mutual Security Bank, which was later incorporated into National Commercial Bank. While she was at MSB, she occupied various positions which exposed her to various areas of banking.

In 1995, Mrs. Williamson left MSB to join her family business, The D & B Auto Group of Companies as the Director and also Financial Controller/Manager. In 2004, Mrs. Williamson formed CSW Spa at The Hilton/Wyndham Hotel. In 2016, she was appointed as Director to the Board of the National Irrigation Commission. Based on her financial background, she was appointed as Trustee, she Chairs the Finance Committee, as well as a member of Pet Committee, HR Committee at the National Irrigation Commission. In 2019, Mrs. Williamson was appointed as a Financial Advisor with Sagicor Insurance Brokers/Sagicor Cayman. In May 2023, Mrs. Williamson was appointed as a Director to the Board of the Jamaica National Import Export Association.