Pilots are assigned to owner/aircraft, and typically it is a two-pilot 'standby' arrangement. There are no rosters, pilot pools, aircraft/trip preferences or similar - this is not the airlines! The hours per year/days away depends entirely on the owner's rate of effort. Some fly a couple of times a month - others are away for all but a handful of days in a month. Metrojet observes crew rest/crew duty limitations on par with 135 ops.
There are -rare- instances of 3-pilot crews where there is some scope for rostering, but this is not the standard.
The majority of aircraft are HK 'B' registered, which creates some difficulties when it comes to supplementary crewing during leave, training etc. (HKCAD does not issue licence validations - you have to have a B licence to fly a B jet). Some pilots at MTJ find themselves loaned out to other aircraft in Metrojet to fill these gaps as necessary, which adds to the workload.
Additional responsibilities are available for those who are so inclined.
The absence of a type rating is not necessarily a hindrance if you have experience on similar types, but the tradeoff will be some sort of training bond or similar arrangement to offset the cost of a new rating.