Office Assistant salary at Grossmont Union High

The average office assistant salary at Grossmont Union High was $64,994 , which is 4 percent higher than the average salary for this job in California, and 31 percent higher than the national average for this job . Office Assistant salaries at Grossmont Union High typically range from $50,673 to $83,902 (25th to 75th percentile). The highest reported office assistant salary was $103,468. There are 32 employees at Grossmont Union High with the job title office assistant.