Professional sales training singapore by Sales training institute (sei) Formerly known as Sales Excellence Academy (SEA), the Institute was founded and led by Asia’s Most Sought-after Sales Trainer, Leroy Frank Ratnam in year 2008. Till date, Sales Excellence Institute has trained more than 150,000 sales professionals across numerous industries in the region. In 2014, Leroy was appointed as Country Director of the SMI (Sales & Marketing Institute International) for Singapore. Sales Excellence Institute is designed for executives, entrepreneurs, managers, business owners and industry leaders involved in direct sales, marketing, business development, retail management, Customer Relations, Accounts Management (Including High Net worth) and many more.