Back-of-the-envelope analysis here. Feel free to correct/critique this:
Physicians: swing group, but healthcare law caused them to favor Romney in 2012
http://www.benefitspro.com/2012/10/11/most-physicians-back-romneyEngineers: My guess is this is a pretty swing constituency as well, with computer science being one of the more liberal and mechanical/industrial engineering probably swinging more conservative (associated with manufacturing and transportation, which tend to lean more conservative as industries)
Accountants: I'm pretty sure these folks do lean Republican, along with most general business types
Stockbrokers: probably lean Republican in a normal election year
Dentists: definitely lean GOP here (
http://thewealthydentist.com/surveyresults/058-dentists-presidential-election-2.htm )
Nurses and schoolteachers: Both lean Democratic as evidenced by the unions, but nursing professors tend to be more conservative than other college professors, and there are certainly plenty of GOPers in both fields.
Pilots- my gut is this group leans Republican due to its high male % and the proportion of them ahving military experience.
What's interesting is the big divide between the voting habits of scientists and engineers/physicians. I think the big factors at play is the smaller factor of government grants for engineers/physicians as well as a much smaller likelihood of having their work tie into the climate change issue. Religiosity is also a factor; I know multiple scientists who go to my church and am almost certain they are Republicans if they vote. However, Evangelicals are a much smaller minority among scientists compared to doctors/engineers and thus there's a big political difference reflected in that. Income and university affiliation also come into play here, as scientists tend to earn less than doctors/engineers, on average.