Thenus obtained his Bcomm LLB degree from the North West University, Potchefstroom in 2008 and his LLM also from the North West University, Potchefstroom in 2009.

After completing his articles at Savage Jooste & Adams Inc in Pretoria in 2010, Thenus joined Botha De Wet & Rood Inc in Klerksdorp in 2011. Thenus worked as a professional assistant in the conveyancing Department. In 2016 Thenus joined Botha & Botha Attorneys Inc as a director.

He specializes in all types of Conveyancing work, including Transfers of property, Bond and Bond Cancellation Registrations, Township and Sectional Title Development, drafting of contracts. As a Notary Public Thenus also do Notarial work such as Servitudes, Cessions, and Antenuptial Contracts.