People mention desire for “frum” environment, but also consider “ehrliche” environment also. I heard about a hesitant law student asking R Soloveitchik whether it is ok to go into a profession where many are involved in lies and other ad behaviors. He responded – “so, you will be a poor lawyer”.
Indeed, there is a need to have a profession that will support a family and let you be an ehrliche yid. There is no need to be at the top of a particular profession if this requires compromises. There are might be some jobs where even earning a modest living honestly is hard. For example (notionally, not saying that every business is in this predicament) you run a construction or re-modeling business – how do you compete on price with those who hire illegals and ignore codes? Or, running a nursing home or selling standard merchandize on amazon – where margins are small, you again can earn a living by skirting rules and quality controls, every undernourished elderly would feed you … In this sense, accounting seems like a moderate risk – of course, you can get in trouble by joining a company in fraud, but it is not that difficult to earn a living by being honest, and even keeping others honest. At the other side of the spectrum, if you strive to be at the top of your profession – being an engineer or a computer programmer might be better. In this jobs, someone who is good at his job will get paid more just for that, no tricks required.