After the fall of communism in his homeland, Kristoff moved to Canada, where he attempted to join the Toronto Police Service, but was rejected due to his poor English skills.

One was an exterior repair in 2003 of the CN Tower antenna mast at 526 metres (1,726 ft), during extreme winter conditions with winds above 60 kilometres per hour (37 mph).

HEART was created to address the needs of over 12,000 high-rises in Ontario, to improve training procedures for rope workers, and to prevent accidents for which traditional emergency response teams would not be equipped.

Over a one-year period, these experts, along with a representative from Hewlett-Packard Bulgaria, worked together with Kristoff to find the most advanced equipment and wireless video broadcast technology (including IP cameras).

The same year, he opened the CFL playoff game between the Toronto Argonauts and Montreal Alouettes by rappelling down from the roof of the Rogers Centre.

[15] His projects have appeared in publications including the Toronto Computes, Computer Player, Quebec Micro, The Athlete, Bulgarian Army Newspaper, National Post, The Toronto Sun, The Globe and Mail, Town Crier, Mississauga News, Mississauga Business Times, and others.