He took office in 2002 together with President Georgi Parvanov, and they were re-elected for a second term in 2007.

Marin was born in Batak and completed his high school education in Devin in 1960.

In addition, he received a Civilian degree in Radio Electronics Engineering.

Between 1974 and 1978 he attended The Military Artillery Academy in Saint Petersburg.

He graduated with distinction and a gold medal in "Command of Chief of Staff HQ and Operative-Tactical".