[7][8][9][10][11] During the latter year, Kaiser also contested the Touring Car Endurance Series in the TCR category, where he and full-time teammate Felix Wimmer finished the season fourth in the standings.

[16][17] Kaiser drove for Graff in two races of the Asian Le Mans Series at the beginning of 2020, scoring a podium in Thailand, before embarking on a campaign in the MLMC together with Rory Penttinen, driving a Ligier JS P320 in LMP3.

[24][25] After struggling during the first few races, Kaiser and Penttinen took points three times and finished on the podium at the final round in Portimão, which led them to ninth in the teams' standings – four places below the sister Graff car.

[26][27] For 2022, Kaiser stepped up to contest the ELMS in the LMP2 category after being upgraded to a silver ranking by the FIA, driving together with Thomas Laurent and Ugo de Wilde at Mühlner Motorsport.

[28][29] With a season-best third place which came from a strategic gamble at Monza, the team finished 11th in the standings, having retired from the final two races, including due to a crash caused by Kaiser in Portugal.