Highest salary at Seneca in year 2011 was $119,800. Number of employees at Seneca in year 2011 was 442. Average annual salary was $37,499 and median salary was $38,934. Seneca average salary is 20 percent lower than USA average and median salary is 10 percent lower than USA median salary. From 2010 to 2011, the average salary of employees at this employer increased 3.4 percent, the median salary increased 4.4 percent.