Guus Boender studied econometrics at the ESE and was the founder of Ortec. Unfortunately, Guus Boender has recently died of the effects of cancer. The articles of the Financiele Dagblad discuss the dedication of Guus Boender for the retirement scheme. In addition, Jaap Koelewijn discusses his memories of Guus Boender in the second article. You can read the entire interview on the website of the Financiele Dagblad, be aware that you must first register (free of charge).