The estimated average salary for a System Integration/ Test Engineer at Lockheed Martin is £43,946 per year or £21 per hour, but some professionals have reported earning up to roughly £71,425 per year (90th percentile). The typical pay range is between £34,744 (25th percentile) and £56,284 (75th percentile) annually. This is based on 12 salaries submitted by Lockheed Martin System Integration/ Test Engineer professionals on Glassdoor, as of Jun 2026.