CA is the 60 min, you have to read the mission text before accepting the mission, you need to make sure that mission giver is inside CA HQ, keep rolling missions till you find that it is inside HQ.

also you need to buy 3 cheapest chemicals from cryton tech tools about 100 stack each.

normaly you do the mission in order where you talk human resource guy first and return the mission to FSM, but you can do it other way around too, where you first return chemicals to FSM and then talk human resouce guy.

it makes it faster if there is citycom close both humah resouce guy and FSM.