Amberson was a Manticoran citizen and an officer of the Royal Manticoran Navy.

In 1903 PD, Amberson held the rank of Lieutenant Commander, and was assigned to the light cruiser HMS Apollo as the Chief Tactical Officer.

During the Battle of Blackbird, Amberson coordinated his tactics with Lieutenant Rafael Cardones, the heavy cruiser HMS Fearless' tactical officer. Amberson, Lieutenant Androunaskis, and the entire astrogation team were killed in a secondary explosion during the battle. (HH2)