He's been missing since wave 1.
Ghost was part of the initial first team that arrived in Chernarus back in 2017.
He aided in the crucial operations that occurred in South Zagoria during this time period.
He and his Spotter, 'Rebel' were amongst the first of Wave 1 to encounter The Damned.
'Rebel,' was killed by the Damned not long after their first interaction with them.
He's been hunting members of The Damned ever since, and has been out of contact with all other members of the Corporation for the last two years other than one other Operator... Hammer.
His travel and hunt for those who killed his friend and colleague has led him all the way to Livonia, that's where he is now