Here are the mean annual wages after their average tax rates in the USA with several common salaries as a comparison. These do not include bonuses or benefits.

Petroleum Engineer = $107,000
>cyclical lifestyle
-$96,000 = $8,000 per month
Physicist = $87,500
>PhD required
Computer Research Scientist = $86,000
>PhD required
-$84,000 = $7,000 per month
Computer Hardware Engineer = $81,000
Aerospace Engineer = $81,000
Economist = $81,000
>PhD required
Actuary = $81,000
>5-10 years of exams
Chemical Engineer = $79,000
Software Developers, Systems Software = $79,000
Nuclear Engineer = $77,000
Software Developer, Applications = $75,000
Mathematician = $75,000
>PhD required
-$72,000 = $6,000 per month
Electrical Engineer = $71,000
Materials Scientist = $71,000
>PhD required
Materials Engineer = $69,000
Mechanical Engineer = $66,000
Civil Engineer = $66,00
Statistician = $66,000
>MS required
Industrial Engineer = $65,000
-$60,000 = $5,000 per month
Chemist = $59,000
>PhD required
Accountant = $56,000
Registered Nurse = $54,000
Biologist = $49,000
>PhD required
-$48,000 = $4,000 per month

There are caveats with this. Scientists and Mathematicians all will require PhDs to earn such wages. Actuaries require 5+ years of intensive exams. Engineers typically have 45-50 hour weeks to earn those wages and probably earn Masters degrees. Petroleum Engineers have cyclical careers. A Statistician will require a Masters degree.