Born in Kaiserslautern, Koch first studied music and German pedagogy, graduating with a focus on organ playing and choral conducting.

[3] In the Idstein region, Koch has conducted symphonic concerts at the Unionskirche, regularly on the Tag des offenen Denkmals (European Heritage Day), including a cycle of all Beethoven symphonies.

[4][5] The cycle was completed in 2012 with the Ninth Symphony, celebrating the 40th anniversary of the Idsteiner Kantorei, and the centenary of the organ.

[6] Koch has conducted choral concerts, two to three per year at the Unionskirche, and others also at St. Martin, Idstein, and in smaller churches in the deanery.

[10] In 2017, his first concert back in the Unionskirche after extended restoration work included Ola Gjeilo's Sunrise Mass and Eric Whitacre's Five Hebrew Love Songs.