Dr Stanton is one of Weyland-Yutani's team of scientists sent to LV426 to investigate the Aliens and their effect on Weyland staff. He along with Dr David Hail worked on project Olivia inside the Weyland-Yutani Facility.
Reference stats table.
Appearances in the following;
Aliens: Colonial Marines
Winter, O'Neal and Bella reach the Weyland-Yutani Facility and bring Bella into a Laboratory in a hope of saving her from being infected. They find Dr Stanton and O'Neal points a gun at him in a hope he will save Bella, they fail to find a way of saving her and she dies with O'Neal killing the emerging Chest Burster.
Dr Stanton is knocked out by O'Neal and left in the Lab.
Dr Stanton appears on an audio log in the level Battle for Sulaco.
In another audio log while speaking to a superior, Dr Stanton wanted to be excused from working on project Olivia but was refused and led away.
Project Olivia is unconfirmed and isn't mentioned again in any audio logs but is probably Dr Stanton's research into human hosts for the aliens.