For a short time, he worked in Bulgarian Post Office and in the State Railways
He was a professor on physics, technology, and chemistry of powerful explosives at the Sofia Military School. Bulgarian Government awarded him with Gold Medal for Science (1933)
In Sofia, he established leater factory, "Alyaska" electrochemical factory, "Edison" factory for electrotechnical equipment, and "Altos" factory for chemicals and drugs. He was the owner of the newspaper "Sofia News"
Research center for surgical equipment in Toronto Canada appointed him after World War Second
He was director of the research institute for surgical instruments in Champaign, US
Christjo Christofv was a consultant on a secret mission to the US Army up to 11 September 1962, when he and his family became American citizen and US Government awarded him for his outstanding service
Research
He invented "System for affecting the train while moving to prevent accidents"
He modernized telephone messages
