Doorn was a Human male who resided on the planet of Coruscant. Employed by the Coruscant Security Force as a police officer, he had risen to the rank of lieutenant before the outbreak of the Great Galactic War between the Galactic Republic and the Sith Empire. In the subsequent Cold War, Doorn found himself stationed in the Black Sun territory. This assignment proved challenging, marked by continuous urban combat against the Black Sun criminal organization. Like many veteran officers, Doorn grew increasingly disillusioned, annoyed, and exhausted. On one occasion, he was tasked with safeguarding blueprints for Coruscant's secret tunnels. Collaborating with Agent Fieler Dan from the Republic Strategic Information Service, Doorn traced the schematics to the Justicar territory on Coruscant. After losing contact with Dan, he dispatched a Republic operative who successfully located the plans.
Doorn, a Human male, served as a police officer for the Coruscant Security Force on the planet of Coruscant. Prior to the commencement of the war between the Galactic Republic and the Sith Empire, he had achieved the rank of lieutenant. Later, during the Cold War, he was assigned to the Black Sun territory, a demanding post due to the ongoing street battles with the Black Sun crime syndicate.
Around 3643 BBY, the vigilante militia known as the Justicars' Brigade stole plans detailing the secret tunnels beneath Coruscant. Doorn was charged with retrieving these plans and dispatched Fieler Dan, a female agent from the Republic Strategic Information Service, to ascertain their location. However, communication with the SIS agent was lost, prompting Doorn to enlist the assistance of a Republic individual to find her. This individual managed to infiltrate the Justicars' Sector and locate the missing agent. Dan revealed the location of the plans but requested a copy to provide to her daughter for aiding in the distribution of food and supplies to refugees. The individual successfully recovered the plans and returned to Dan, intending to hand over the schematics to Doorn. However, Dan implored the individual to allow her to make a copy. The individual agreed and then returned the plans to Doorn without disclosing that duplicates had been made.
Doorn was a Human male characterized by fair skin, black hair, and deep blue eyes. While he had once held pride in his position and rank, this sentiment had waned by the time of the Cold War. Like his fellow veteran officers, Doorn experienced burnout and frustration. The relentless street warfare had negatively impacted living conditions, affecting both law enforcement and civilians alike. In Doorn's view, police work was no longer about maintaining peace but had become a challenging job with inadequate compensation.
Doorn is featured in the Republic-aligned mission "Secret Passages" within Star Wars: The Old Republic, a massively multiplayer online roleplaying game developed by BioWare and launched on December 20, 2011. In this mission, the Republic character undertakes a task for Doorn to secure blueprints of secret tunnels on Coruscant. The player has the option to deny Dan's request to make a copy, representing a dark side choice.