Source: https://commons.wikimedia.org/wiki/File:Pexels-luis-gomes-546819.jpg
Mechanical Engineers use computer extensively. In addition to using CAD software to design products, mechanical engineers use computers to read sensors and analyze usage patterns.
Like other engineering fields, running computer simulations is also a key component to the job. Many times a design's reliability can only be tested through a simulation developed with computer science programs.
https://www.bls.gov/ooh/architecture-and-engineering/mechanical-engineers.htm