In 2014, Sargissian tied for 1st–2nd with Priyadharshan Kannappan in the 23rd Annual Chicago Open. In 2015 he tied for 1st–3rd with Pentala Harikrishna and Laurent Fressinet at the 2nd PokerStars Isle of Man International Chess Tournament in Douglas, Isle of Man. In November 2017, Sargissian won the silver medal for individual performance on board 3 with a 2797 TPR, 6.5/9 score (+4, =5) in the European Team Chess Championship. In December 2017, he shared 1st–3rd places with Hrant Melkumyan and Sebastien Maze in 9th CSC London Chess Classic FIDE Open.