The salary trajectory of a a Senior Process Engineer ranges between locations and employers. The salary starts at £35,842 per year (estimate) and goes up to £65,023 per year (estimate) for the highest level of seniority.
The estimated average salary for a Senior Process Engineer at Shell is £54,944 per year or £26 per hour, but some professionals have reported earning up to roughly £85,467 per year (90th percentile). The typical pay range is between £44,136 (25th percentile) and £68,972 (75th percentile) annually. This is based on 32 salaries submitted by Shell Senior Process Engineer professionals on Glassdoor, as of Jun 2026.