Highest salary at Westerlo in year 2011 was $56,705. Number of employees at Westerlo in year 2011 was 20. Average annual salary was $36,709 and median salary was $44,649. Westerlo average salary is 22 percent lower than USA average and median salary is 3 percent higher than USA median salary. From 2010 to 2011, the average salary of employees at this employer increased 2.9 percent, the median salary increased 3.4 percent.