The average professional salary at Kelso was $4,894 , which is 92 percent lower than the average salary for this job in Washington, and 92 percent lower than the national average for this job . Professional salaries at Kelso typically range from $3,915 to $6,500 (25th to 75th percentile). The highest reported professional salary was $9,128. There are 46 employees at Kelso with the job title professional.