Sean was born in Alaska into a simple country home. As a young man Sean was always fond of the outdoors hiking, snowboarding, and hunting with his father and adopted brother Joel. Growing up in Alaska helped harden Sean for the outdoors having learned how to survive off the land from his father he is an excellent shot with a rifle and is fairly decent shape. During the later years in his life after college Sean joined the united states navy under a special operations contract. During basic training in one of the few 800 divisions he learned the basics of survival, combat, and naval military operations. After leaving basic he attempted to join the SEALs and go through the BUDS program of training, unfortunately he was unable to match the intense qualifications needed to be a SEAL. Taking the disappointment of his failings in stride the young sailor re-specialized into SWCC. This time finishing his training with soaring colors Sean served as an enlisted sailor for the first four years of his military career before transferring to OCS and putting the degree he earned while serving to use in retraining once more to become an officer.
After OCS Sean once more went through BUDS this time with four years of service under his belt he was able to pass through with flying colors and take his place as a SEAL, with his prior experience with SWCC he was placed as a combat craft team leader for SWCC. It was during his fifth combat mission as a team leader that he, along with many a US and NATO forces, was sent into Chernarus to provide aid and enforce control over the area. Sean's particular mission along with his crew was to guard marine and naval vessels moving to and from the fleet and patrol the coastlines of Chernarus. Towards the end of the NATO forces stay in Chernarus before the lines broke and the forces were pulled back as far as possible Sean and his team were tasked with escorting a team of SEALs north of the port town of Svetlojarsk, his boat and team were tasked with holding the bay of the small fishing village of Berezhki while the SEALs moved inland. They were to hold for forty eight hours and wait for the team to return to be escorted out of country and back to the fleet. That time came and went with no radio contact from the team sent inland and Sean ordered his crew to hold for a while longer, their boat docked at the small enclosed harbor.
During a daily walk inland for a patrol his corpsman and a member of his crew was ambushed by a small group of nationalist soldiers or perhaps Russian forces disguised as such. As the rest of his team responded to the attack the noise of unsupressed gunfire called out to the dead, a horde of them crawling northward from Svetlojarsk and making it's way towards the combat. Sean's team lost it's corpman and one sailor in the ambush and once the horde reached them it didn't take long for the dead to overwhelm most of them leaving Sean and their radio operator Jeremy Higgens to pilot their boat away from shore. Half way out to sea Higgens started to show signs of infection, fever, sweats, hazy eyes and upon inspection Sean found a bite on the inside of his friend's left arm. Not willing to bring the infected man back to the fleet and the thought of killing him to heavy a notion Sean steered their boat back to shore and set it to cruise before diving off and making the swim to South Zagoria Now after having lost his team to the rigors of battle, zombies, and hell knows what else over this country Sean is on his own.
The events after the fall of Chenarus and civilization as a whole have left their mark on Sean, he often finds himself pushing as hard as he can to try and survive setting bigger goals every time he achieves anything he can. Without this constant forward momentum he finds himself getting lost in his thoughts and falling into a state of depression that he has trouble getting out of without something to help drive him once more.
Currently his greatest goal is to contact home and in particular his fiance Mercy Johnson, a navy nurse who stole his heart back when he was still an enlisted sailor, a never ending search for some way of radioing the nearest naval station or the carrier fleet that he was attached to when the shit in the fan. Whether he achieves his goals or not, that has yet to be seen.