The Entegris Specialty Gas and Etch research, development, and engineering team is seeking a Product Development Engineer to provide technical leadership for analytical characterization, validation methodology development, and product return investigations supporting specialty gas packaging technologies. This role serves as a subject matter expert for products and systems that enable the safe, reliable storage and delivery of hazardous materials. The position is responsible for developing test strategies, interpreting complex data, communicating technical conclusions, supporting customer issue resolution, and partnering with Engineering, Quality, Operations, Product Management, and Manufacturing teams to drive product performance and continuous improvement.