|Tolam Pehl was born on August 14th, 2349 along with his twin brother who was born fifteen seconds before himself and, named Korzo. Throughout Tolam’s childhood he dreamed of one day becoming joined and was also quite passionate about chemical engineering. In 2367 he entered into the initiate program and successfully made it through. In 2370 he was joined to the Pizal symbiont before entering into Starfleet Academy, but in the propulsion mechanics field instead of chemical engineering.
Tolam is the sixth host for the Pizal symbiont and the fourth to be in the field of engineering. He is also the second male host the first host being the only other male in the line of hosts for the symbiont. Two of the female hosts were mothers, but Pizal has never been a father. Tolam completed Starfleet Academy in 2374 during the Dominion War and, was assigned as an Engineering Officer on board the USS Shiloh.
Tolam struggled to get along with the Chief Engineering Officer constantly getting into disagreement after disagreement with him. He constantly argued and, eventually was transferred in 2376 to the USS Titan. But, his behavior continued to remain the same while on board the Titan as well and, had even been placed into the brig for attacking a superior officer. He was transferred on to the USS Luxembourg and given an ultimatum. Either Tolam straightened up his act or he would be removed from Starfleet.
At first his old behavior continued, but after he was stranded on a desolate planetoid with the Chief Engineering Officer things began to come into focus. It was there that he had explained how he had struggled as a child to find his place with his family having always lived in the shadow of his brother. What should have been the proudest moments in his life paled in comparison to that of his brother according to both of his parents and therefore his relationship with them had become strained. It was the reason why he didn’t care much for his service in Starfleet.
After that incident the Chief Engineering Officer took him as a protege and, his service to the ship and crew greatly improved over the next several months. Finally in 2382 he was selected for promotion to Lieutenant Junior Grade and the role as Propulsion Officer. From then on he was on a better track and, while his past could always come back to haunt him he never lost his stride. In 2389 Tolam was selected to become the Assistant Chief Engineering Officer on board the USS Onnar.