The average fire engineer salary at Gilroy was $381,778 , which is 44 percent higher than the average salary for this job in California, and 117 percent higher than the national average for this job . Fire Engineer salaries at Gilroy typically range from $363,926 to $417,778 (25th to 75th percentile). The highest reported fire engineer salary was $421,277. There are 9 employees at Gilroy with the job title fire engineer.