Highest salary at Hadley in year 2014 was $52,640. Number of employees at Hadley in year 2014 was 25. Average annual salary was $32,153 and median salary was $42,681. Hadley average salary is 31 percent lower than USA average and median salary is 2 percent lower than USA median salary. From 2013 to 2014, the average salary of employees at this employer increased 0.6 percent, the median salary increased 1.8 percent.