Mars employees working as Project Engineer in US have attributed a compensation and benefits rating of 4 out of 5 stars, based on 10 ratings. This is 2% lower than the average of Project Engineer professionals at Mars worldwide.
The salary trajectory of a Project Engineer ranges between locations and employers. The salary starts at £28,087 per year (estimate) and goes up to £78,235 per year (estimate) for the highest level of seniority.
The estimated average salary for a Project Engineer at Mars is £107,208 per year or £52 per hour, but some professionals have reported earning up to roughly £169,844 per year (90th percentile). The typical pay range is between £84,676 (25th percentile) and £136,961 (75th percentile) annually. This is based on 12 salaries submitted by Mars Project Engineer professionals on Glassdoor, as of Jul 2026.