The salary trajectory of a an Assistant Project Manager ranges between locations and employers. The salary starts at £30,465 per year (estimate) and goes up to £83,078 per year (estimate) for the highest level of seniority.
The estimated average salary for a Assistant Project Manager at Grontmij is £34,895 per year or £17 per hour, but some professionals have reported earning up to roughly £48,650 per year (90th percentile). The typical pay range is between £29,735 (25th percentile) and £41,315 (75th percentile) annually. This is based on 2 salaries submitted by Grontmij Assistant Project Manager professionals on Glassdoor, as of Jun 2026.