Ray 'Creepy' Crawley is an agent with the Australian FSA.
That acronym stands for the Federal Security Agency and its 'patch' seems to be both foreign and domestic in that Crawley and his fellow agents will spend a fair amount of time working the counter-intelligence beat and other times heading off-shore to gather info from other countries. Primarily, though, it is the former which is good because Crawley overseas is often a problem.
When we first meet Crawley, he is on the outs, both figuratively and literally. He is quite hung over from too boozy of a night before (this we find is not at all an unusual occurrence). He is estranged from his wife who is none to happy with him and his attitudes, the latter he is not at all reticent about displaying. He has been fired from his job with the FSA because the last three missions have gone pear-shaped and he was the perfect scapegoat.
Things will improve over time for Crawley because he is under all the snarkiness and flippant commentary that he feels compelled to lay on anyone in authority, actually very good at his job. The problem that those in control see too readily is the snarky and the disrespect; the quality of his work does not show up so quickly or readily which means that Crawley always seems to be the target of somebody's anger. The 'who' the angry person is might change but not the fact that somebody is going to be miffed at him.
Two things make the Crawley adventures interesting. The first is the varied problems that will confront him from trouble from Eastern Europe to trouble from at home to trouble from the Far East; the one commonality is trouble. The second is his assistant, Huck. He is, well, Huck. You have to read about him to understand.