He is the leading scientist of the clone project with the purpose of creating an Alien Queen. He is obsessed with the project. He creates Ripley by cloning in order to hatch the Alien Queen. He succeeds after seven failed attempts and decides to leave Ripley 8 alive once this is done for further study while watching the Alien Queen grow because of her behaving like an adult caused by the alien DNA still inside her. He was killed by his last living victim in the final standoff. He made sure the chestburster would kill him, too, on his way out.