Highest salary at Rolla in year 2018 was $99,742. Number of employees at Rolla in year 2018 was 18. Average annual salary was $56,838 and median salary was $55,412. Rolla average salary is 21 percent higher than USA average and median salary is 27 percent higher than USA median salary. From 2017 to 2018, the average salary of employees at this employer increased 4.1 percent, the median salary increased 3.5 percent.