Lead with the engineering problem solved and the quantified result: 'Redesigned heat exchanger using CFD optimization, increasing thermal efficiency by 18% while reducing manufacturing cost by 12%.' Performance metrics (efficiency, weight reduction, cost), reliability outcomes, and product lifespan improvements are all compelling ways to quantify design engineering impact.

Design for manufacturing (DFM) experience, tolerance analysis, GD&T application, and familiarity with manufacturing processes (injection molding, machining, sheet metal, casting) add practical value beyond theoretical design skills. If you've worked closely with manufacturing teams on design reviews or root cause analyses for production issues, note those collaborative contributions.

Reference the analysis types, software used, and the design decisions your simulations informed. 'Performed structural FEA in ANSYS on bracket design, validating 2.5x safety factor and eliminating need for physical prototype; reduced development cycle by 3 weeks' demonstrates simulation being used to make real engineering decisions, not as a standalone technical exercise.