Pierce was a LuthorCorp security guard who had previously worked at its secret research lab Level 33.1 in the WB/CW TV series Smallville.
He served as the main antagonist in the Season 7 episode "Traveler".
Pierce first worked as a security guard at Level 33.1 and had been hired by Lionel Luthor. During the time he spent working, Pierce came to regard kryptonite-enhanced individuals with fear and loathing, having had to track down and sometimes kill several of them during his career.
Lionel hired Pierce and his team to kidnap Clark Kent for his "protection". At his barn, Clark was suddenly attacked with a kryptonite taser. He manages to fend off his attacker, Pierce, by picking him up and threw him but his attacker called in reinforcements. They shoot Clark with more kryptonite tasers before knocking him out and capturing him.
Pierce transported Clark to a facility that Lionel had built, with a kryptonite cage. Clark awoke in the cage and Pierce deliberate powered up the cell exposing him to kryptonite, and warns him to stay in the center of the cell. Clark tried to break out, but he was unable to do so. Pierce could control the intensity of the kryptonite lining, and he threatens to increase the kryptonite charge even more if Clark tried to escape again.
Lionel entered the control room of Clark's cell and orders Pierce to stop torturing Clark. Lionel revealed that he built the cell to contain Clark, but he doesn't want Pierce to harm Clark in any way. Patricia Swann demanded to see the Traveler and when Lionel refuses, she claimed to evidence linking him to their murders of Edward Teague and Robert and Laura Queen.
A worried Lionel watched Clark stumble around his cell. Patricia entered the control room and orders to see the Traveler before handing over the incriminating evidence. After Patricia saw Clark locked up, Pierce knocked her out while Lionel took her briefcase.
Lionel ordered Pierce to discreetly bring Clark home, but Pierce held a gun and refused. Pierce told Lionel that he hated meteor freaks and that he wanted Clark dead as he was a threat to national security. Lionel denies that Clark is a threat, but Pierce knocks Lionel out before increasing the kryptonite charge to a fatal level. Clark collapses to the ground in pain.
The doors suddenly burst open, and Kara Kent arrives blasting the controls with her heat vision. She lifts the cage off of Clark and throws it towards the control room, shattering it. Pierce stepped forward to shoot Kara and Clark with a kryptonite taser, but Lionel hit him with a bar. Pierce fell out from the overhead window and was impaled, killing him.