In the 2350s, he served on Bajor during the Occupation of Bajor. In 2357, he was the commander of the Gallitep labor camp. Due to his brutal behavior and mistreatment of Bajoran laborers, he was nicknamed the "Butcher of Gallitep" by the Bajoran people. He was awarded the Proficient Service Medallion for his leadership in the camp. While he was on Cardassia receiving his medal, a mining accident at the camp affected his staff, contracting Kalla-Nohra Syndrome. He would remain unaffected. Later that year, the Shakaar resistance cell liberated the camp.
In 2369, Aamin Marritza, a Cardassian file clerk, impersonated Darhe'el, hoping to be punished for not opposing the crimes committed during the occupation of Bajor. However, an old image retrieved from the Bajoran Archives proves that he was in fact the file clerk. (DS9: "Duet")
According to the script, Darhe'el was pronounced as "dar-HEEL".