Havelock was from Earth. Although he worked on his home planet for only six months in total – he did eight years in the orbitals, homicide in Terrytown and three years of vice at L-5 – he was never respected as an equal among his Belter colleagues at Stone & Sibbets (where he was one of two Earthers on a twenty-berth hauler from Luna to Ganymede) and especially while working for Star Helix.
As tensions grew further between the inner planets and the Belt, Havelock became more and more alienated from his Belter colleagues at Star Helix Security. At one point he got drunk at the Blue Frog bar, looking for fights, but was talked out of it by his partner, Miller. When the war escalated and the frequency of OPA mobs on Ceres grew, Havelock was ordered to not take part in the crackdowns. When Miller's side investigation of Julie Mao picked up, Miller asked Havelock to cover at work for him. Soon after, he quit his job and joined Protogen, which had just rotated out of its Eros contract and had done a port of call on Ceres.
Earth then ceded Ceres and the OPA took control of Star Helix and the Station itself. Miller was fired, but continued on with his investigation of Julie. Miller later contacted Dimitri for information regarding the Rocinante's whereabouts. Dimitri replied back stating the Roci made a flight plan to Eros. He also told Miller that Protogen was hiring and that he could put in a good word for him if Miller was interested.
After the Eros incident, Miller contacted Havelock and asked him for information on Thoth Station, the presumed Protogen lab that monitored Eros. Havelock sent his former partner the coordinates to Thoth via an encrypted drop site on a server cluster on Ganymede.
In Leviathan Wakes, Havelock's first name was mentioned once as being "Dmitri". However, in Cibola Burn (where he is a major viewpoint character), his name is given as "Dimitri". These are most likely two different transliterations of the original Russian name Дми́трий.