The differences between Sustaining Engineers and Senior Process Engineers can be seen in a few details. Each job has different responsibilities and duties. While it typically takes 2-4 years to become a Sustaining Engineer, becoming a Senior Process Engineer takes usually requires 2-4 years. Additionally, Senior Process Engineer has a higher average salary of $105,378, compared to Sustaining Engineer pays an average of $88,351 annually.

The top three skills for a Sustaining Engineer include Troubleshoot, Lean Six Sigma and Lean Manufacturing. most important skills for a Senior Process Engineer are Continuous Improvement, Project Management and Data Analysis.