Parker was originally a member of the FBC tasked with helping out during the 2004 Veltro terrorist attack of Terragrigia. However he and his partner Jessica Sherawat barely managed to make it out alive and fled into the FBC building. During their trip to the Command Room, they met and saved the new cadet, Raymond Vester. He and Parker then bonded. At the command room, they met Morgan Lansdale, who was collaborating with Jack Norman, and in the midst of betraying him.
After that, the group escaped the city. In 2005, Parker and Jill Valentine followed Chris Redfield and Jessica's last known coordinates to a stranded cruise ship named Queen Zenobia in the Mediterranean Sea. They realized that the entire crew of the Queen Zenobia had been turned into monstrous bio organic weapons named Ooze and are forced to fight for their lives. On the ship's bridge, they are surprised to meet none other than Vester who claims to be there by orders of the FBC.
After Jessica is revealed to be a traitor, she sets the Queen Zenobia to self-destruct. Parker was later seen dangling above end then falling into a series of explosions after the floor he was standing on collapsed. It is ultimately revealed that Raymond Vester saved Parker from the explosion. Parker was then found adrift off the shore of the Republic of Malta in the Mediterranean Sea.
He resumed his position as a Special Operations Agent for the BSAA after a month of recovery.