During the Clone Wars, Tech was a member of the Bad Batch, an elite group of clones called in for special missions for the Republic. On Skako Minor, Clone Force 99 helped Anakin Skywalker and Clone Captain Rex get behind enemy lines to rescue the clone called Echo, who was previously thought lost in the escape from the Citadel. It was Tech who first locked onto the live signal that suggested Echo was alive and being held captive. His abilities also helped the team to communicate with the Poletecs and tap into a Separatist Dreadnought to feed the enemy bad intel and clinch a Republic victory.

At the end of the war, as the Emperor executed Order 66, Tech and the rest of the Bad Batch did not respond to the inhibitor chip in the same way as their clone brothers. Back on Kamino, Tech and Clone Force 99 were tested by the Empire, which used live ammunition to assess their battle prowess in what was intended to be a training simulation.

After an Imperial mission to eliminate an insurgency of Separatist droids on Onderon -- only to find organic beings just trying to survive -- Tech and his brothers defected from the new Empire alongside a child called Omega, who was a mutated clone like the rest of the Batch. However, Crosshair remained behind to serve the Emperor and Admiral Tarkin.

In hiding from the new regime, Tech's prowess was invaluable to the members of the Bad Batch and their allies. As chain codes became prevalent, Tech used his abilities to create the proper documentation for Cut Lawquane and his family to help get the former clone and his kin to safety.

Although Tech tried to warn his brothers about the inhibitor chip implanted in each of their brains -- a failsafe created to turn rogues into mindlessly compliant soldiers -- it wasn't until Captain Rex tracked them down on Ord Mantell that the others fully understood the danger the chip posed. Ultimately, the chips were removed from Tech and the rest of the Bad Batch on Bracca.

The power surge in the Jedi Cruiser's medical bay, however, attracted the Scrapper Guild and the activity was reported to the Empire, bringing Crosshair and his new troopers to their door. The power Tech restored for the surgeries was turned against them as the Empire first used cannons then the engine bay to try to eliminate Clone Force 99.

But Tech and his squad escaped, and ultimately ended up back on their homeworld of Kamino. Together with Crosshair, they witnessed the planet's destruction by the order of Vice Admiral Rampart and his Star Destroyers. The Bad Batch were presumed dead, but secretly survived, leaving Crosshair behind when he refused to join them once more.

Several months after the disaster on Kamino, Tech and Clone Force 99 continued to work missions for Cid. They hunted for treasure at Dooku's castle on Serenno and took on the dangerous delivery of forged chain codes to the Vanguard Axis, as well as working security detail on Safa Toma, where Tech ended up entering the riot races after Cid's droid, TAY-0, was destroyed in a wipe-out. One desperate mission took Clone Force 99 to the Empire's stronghold, the former Republic capital of Coruscant. There, the Batch infiltrated Vice Admiral Rampart's docked Star Destroyer in search of valuable records that would prove it was the Empire that ordered the destruction of Kamino.

Tech struggled with navigating his squad’s emotions following Echo’s departure to join Captain Rex on a mission, but in time he learned to help Omega as she grappled with the constant change unfolding around them. Settling on Pabu, Tech acted as Omega’s flight instructor and became close with the treasure hunter Phee Genoa. But the respite was brief. After receiving a coded transmission from Crosshair warning of the Empire’s continued interest in Clone Force 99 and data showing he was being held prisoner, the squad made a plan to infiltrate an Imperial summit seeking intel on the Advanced Science Division.

On Eriadu, their plans went awry as rebel operative Saw Gerrera detonated explosives around the Tarkin family compound, trapping the Batch on the rail line. Tech successfully rebooted the power to their connected cable cars, but enemy fire threatened to pull both cars from the tracks. Tech was left dangling perilously from a repelling cable. Assessing the situation, he arrived at only one logical conclusion: to execute Plan 99. Sacrificing himself and severing the connection between the cable cars, Tech plummeted out of sight while the car carrying Wrecker, Hunter, Echo, and Omega returned to the tracks.