Instrumentation engineers can find some of the best pay in Baton Rouge, LA, with an average salary of $135,088. Dallas, TX, and Atlanta, GA, also offer strong salaries, with averages of $129,877 and $129,717, respectively. Seattle, WA, and St. Louis, MO, round out the top five cities for high pay, with averages of $128,961 and $128,267.