Highest salary at Hadley in year 2010 was $54,225. Number of employees at Hadley in year 2010 was 21. Average annual salary was $33,985 and median salary was $39,471. Hadley average salary is 27 percent lower than USA average and median salary is 9 percent lower than USA median salary. From 2009 to 2010, the average salary of employees at this employer increased 6.4 percent, the median salary increased 2.3 percent.