Career
Vollmann is a youth exponent of 1860 Munich. After he played his first four games for 1860 Munich II in the 2011-2012 season in the Regionalliga Süd he went on a loan to 3. Liga club Unterhaching for the rest of the season and managed to score once in 13 appearances.
In the upcoming years Vollmann was a regular player of 1860 Munich II in the Regionalliga Bayern.
In the 2014-2015 season he replaced injured Michael Kokocinski as captain in several games and scored 14 goals out of 20 appearances. In March 2015 he extended his contract until June 2017.
Vollmann played his first full match from the beginning on against Sandhausen on 8 March 2015. On 20 January 2016 he signed for SV Sandhausen.