In Elim Garak's time as an Obsidian Order operative Dr Parmak was interrogated by Garak after being arrested for being part of an illegal political group, the interrogation was implemented in part as test by Enabran Tain, wanting to be sure his doctor was trustworthy. Parmak was no coward but was rather sensitive and after four hours of Garak staring at him he relented and told them everything he knew.
Years later, when Dr. Parmak was working with Garak in the voluntary med unity, he still had trouble making eye contact at first, but the past was soon forgotten and the two became good friends.
Parmak was an ardent supporter of Alon Ghemor's democratic political movement – the Reunion Project and became a prominent figure in the organisation often making speeches at rallies alongside Ghemor. (DS9 novel: A Stitch in Time)
In 2380, Parmak discovered an ancient Hebitian text which spoke of a metadimensional nexus which contained all wisdom, knowledge and resources. This nexus sliced through creation and connected everything that ever was, is or will be. These texts refered to the place being called the Vinculum. Parmak rescued Garak from the Vinculum after a failed mission there. (DS9 short story: "The Calling")