The salary trajectory of a a Third Line Support Engineer ranges between locations and employers. The salary starts at £23,792 per year (estimate) and goes up to £44,715 per year (estimate) for the highest level of seniority.
The estimated average salary for a Third Line Support Engineer at Modality Systems is £36,383 per year or £17 per hour, but some professionals have reported earning up to roughly £55,040 per year (90th percentile). The typical pay range is between £29,258 (25th percentile) and £45,244 (75th percentile) annually. This is based on 1 salaries submitted by Modality Systems Third Line Support Engineer professionals on Glassdoor, as of Jul 2026.