I applied online. The process took 6 weeks. I interviewed at Koch in Nov 2022
Interview
4 interviews with different people in the organization done - each assessing something different attributes from experience to behavioral questions. Not everyone is asking the same things so it made the process seem challenging but quick. Recruitment was very responsive to questions.
Orientation followed by a test which was easy , questions from computer science and from aptitude also after that interview was in the company office and after 3 days the selected candidate list came out
Interview questions [1]
Question 1
About projects and general questions about your attitude towards others
I applied through an employee referral. The process took 4 weeks. I interviewed at Koch (Wichita, KS) in Feb 2019
Interview
Koch's twist on the STAR behavioral format everyone else uses. Usually multiple single person face to face interviews after an HR screening interview. You could prepare by reading one of Charles Koch books.