3M employees working as an O2 Engineer in United Kingdom have attributed a compensation and benefits rating of 5 out of 5 stars, based on 1 ratings. This is 11% higher than the average of O2 Engineer professionals at 3M worldwide.
The salary trajectory of a an O2 Engineer ranges between locations and employers. The salary starts at £33,312 per year (estimate) and goes up to £144,626 per year (estimate) for the highest level of seniority.
The estimated average salary for a O2 Engineer at 3M is £40,190 per year or £19 per hour, but some professionals have reported earning up to roughly £71,673 per year (90th percentile). The typical pay range is between £30,546 (25th percentile) and £53,829 (75th percentile) annually. This is based on 3 salaries submitted by 3M O2 Engineer professionals on Glassdoor, as of Jun 2026.