He completed a Journalism degree with Rhodes University in 1998. In 1999, he realised this was a bad idea and solicited a Copywriting diploma from the AAA School of Advertising. From 2000 – 2003 he spent quite a lot of time at the FCB Johannesburg company bar where he masquaraded as a copywriter with great success until he was promoted to Creative Group Head. Fearing an imminent bust, Tseliso left the company and joined a family venture operating in the South African wine industry.
After nearly three years of free wine, meals and accommodation Tseliso joined Ogilvy Johannesburg in 2007 as a senior copywriter and was later promoted to Creative Director. Since joining Ogilvy, Tseliso has been seen speaking to the marketing executives for brands like Eno, Sprite, Channel O, Mzansi Magic, SuperSport, Miller Genuine Draft, Cadbury Dairy Milk and Lucozade among others. No one knows what these conversations entail.