For sixteen years – from 2002 to 2018 – Ruben Gazarian was the Artistic Director and Principal Conductor of the Württemberg Chamber Orchestra Heilbronn. In more than 860 concerts and 26 CD productions of this time, he enriched the standard repertory of the orchestra by occasionally
expanding it to symphonic dimensions and by selecting numerous works from the Romantic and early modern eras, as well as from the avant-garde. In recognition of his achievements during this extended Heilbronn tenure, he was awarded the Golden Coin of the city in 2018.

In addition to his Heilbronn position, at the beginning of 2015 Maestro Gazarian became the Artistic Director of the Georgian Chamber Orchestra Ingolstadt. In May 2017, the contract in Ingolstadt was consensually extended by three additional years.

As guest conductor Ruben Gazarian has directed renowned orchestras such as the Radio-Sinfonieorchester Stuttgart des SWR, the WDR Sinfonieorchester Köln, hr-Sinfonieorchester Frankfurt, the Hamburg Symphony Orchestra, the Kassel State Theater Orchestra, the Deutsches-
Symphonie-Orchester Berlin, the Frankfurt Museum Orchestra (Frankfurt Opera Orchestra), the Hessian State Orchestra Wiesbaden, the Northwest German Philharmonic Herford, the Orchestre National de Lyon, the Jerusalem Symphony Orchestra, the Israeli Orchestra Rishon LeZion, the
Wroclaw Philharmonic Orchestra, the Belgrade Philharmonic Orchestra, the Zurich Chamber Orchestra and many others.

He also conducted numerous live and studio recordings for the Southwest German Broadcasting Corporation (SWR), the Hessian Broadcasting Corporation (HR), the West German Broadcasting Corporation (WDR), Deutschlandradio, the Central German Broadcasting Corporation (MDR),
Radio Svizzera Italiana, Radio France Musique, Radio Denmark and others.
Gazarian works successfully with acclaimed musicians such as Gautier and Renaud Capuçon, Julia Fischer, Hilary Hahn, Katia & Marielle Labèque, Elisabeth Leonskaja, Sabine Meyer, Viktoria Mullova, Sergey Nakariakov, Gerhard Oppitz, Fazil Say, Jean-Yves Thibaudet, Frank Peter Zimmermann, the Beaux Arts Trio, the Gewandhaus-Quartet and several others.