Engels is one of the soldiers of Westworld QA Security Force.
Engels parasuited to the Mesa Hub along the rest of Coughlin's team.
Engels, alongside several members of the Extraction Team and QA were holding off Wyatt's gang as they entered the Mesa Hub. He and his managed to shoot several members of the gang, including Clementine Pennyfeather. He saw Angela and followed her into the Cradle. Angela managed to lure him close by seducing him and the pulled the pin of one of his grenades, killing both and destroying the Cradle.
In the Cradle, Angela lures and tricks Engels by unpinnig his grenade, which later results in a huge exploison.
This list shows the victims Engels has killed:
Engels appeared to have a cocky personality, seeming very overconfident during the fight againts the hosts. He managed to incapacitate Clementine Pennyfeather, and "killed" several other members of Wyatt's gang. Despite this, he was easily seduced by Angela, which led to his demise.