He is a three-time Grand Prix medalist, an 11-time Bulgarian national champion, and competed at three Olympics.

At the 1999 World Championships, Dinev became the first Bulgarian skater to land a quadruple toe loop in competition.

[1] He won bronze at the 1999 Trophée Lalique, becoming the first skater from his country to medal at a Grand Prix event.

[1] At the 2000 Sparkassen Cup, Dinev's blade broke during a warmup before the free skate; he bought a replacement of a different brand and finished 5th.

Dinev then moved to Lake Arrowhead, California, to work with Rafael Arutyunyan.