About Castille

Castille Information Technology is a comprehensive IT solutions company. We focus on providing customers with a Single Point of Service in the Information Technology Sector, thus allowing them to utilise the knowledge of our Information Experts to their advantage while focussing on their core business. This multi-disciplined service includes aspects such as:

  • internet solutions
  • network & system services
  • system support
  • design solutions
  • advisory services
Castille was formed in Johannesburg, South Africa in early 2005 and have since then consistently grown to successfully deliver solutions to clients throughout South Africa as well as Internationally. We believe every business has distinctive requirements and therefore we use innovative technology to deliver a unique solution to every customer. As Castille pushes into new frontiers, it remains dedicated to its original objective of helping people improve business through technology.

Executive Biographies

Maritz E. Jonker

Managing Director

Oversees the company's overall strategy and day-to-day operations.

Maritz E. Jonker founded Castille in 2005 and serves as Managing Director. From 2002 to 2005, Maritz was Chief Information Officer of The Foundation Hospitality Group (Pty) Ltd. He served in various other executive capacities at Foundation Group from 2000 to 2005. In 1999 Maritz started Net-FX Internet Service Provider Company which focused on delivering internet services and software & system development until the company was merged into Castille IT (Pty) Ltd. in 2005.
Belinda Jonker

Director, Direct Retail

Responsible for the company's consumer and small business web and phone sales. Before joining Castille, she spent 4 years at Net-FX. Her last two years there were as senior associate, overseeing Net-FX's online stores. Belinda has a bachelor's in psychology from the University of Sourth Africa (UNISA).