Yassin joined United Pharmacy in 2012 and assumed his current role in January 2024. The pharmacy chain has over 400 stores in all 13 Saudi provinces and more than 70 governorates. It also provides prescriptions to the Saudi government sector through the Wasfaty program. Between September 2023 and July 2024, it opened over 100 pharmacies across Saudi Arabia. Before taking his current role, Yassin was the VP and CFO at the company.