Head hunted by Amstrad, he joined their operation in Australia, before returning to the UK to try to address issues surrounding production of the IBM-like PC.
After Amstrad withdrew from the PC market place, Tkachuk became CEO of Viglen.
He came to UK public recognition through his direct style of job interviewing on The Apprentice,[1] having appeared in the first six series.
Notable events during these interviews include discovering that the eventual Series 4 winner Lee McQueen had lied on his CV about his time spent at university and that Series 6 contestant Stuart Baggs had exaggerated his telecommunication operations.
"I've been running Alan Sugar's companies for the last 25 years, and that's why I know a little bit about technology."