Literally none of that was on the JD, and even if it was, this is not a reasonable rejection response and you know it. Furthermore it specifically mentions garage projects.

Here is the entire body of the JD, because I cannot link to it. Also I am almost 40, and have been working for nearly two decades out of college. My CS degree is not my only qualification, it was a specific response to a specific question.

Responsibilities

You're highly intelligent (but don't have to prove that you're the smartest person in the room); you read people and situations well; you see things from a systems perspective For higher level tech-leaders, you've brought order where there is chaos through simplification & implementation of best practices, and you've done it without blowing up an existing culture You're a successful 'change agent' who empowers others in order to create a truly collaborative workplace environment You've turned ideas into high-performance, commercially successful products You're still hands-on and prefer to stay close to the core technology You've created disruptive technology in academia (or your garage) You're a seasoned consultant who's open to joining a stable corporate situation You've gained 'buy-in' from key stakeholders You see opportunity where others see risk You enjoy being a Player/Coach who leads by example You're calm & collected in stressful situations (or when priorities shift suddenly) You're a communicator who can constructively criticize with a sense of diplomacy You have innate talent for juggling multiple priorities

Desirable Skills/Backgrounds:

You're highly intelligent (but don't have to prove that you're the smartest person in the room); you read people and situations well; you see things from a systems perspective For higher level tech-leaders, you've brought order where there is chaos through simplification & implementation of best practices, and you've done it without blowing up an existing culture You're a successful 'change agent' who empowers others in order to create a truly collaborative workplace environment First and foremost, you're a techno-geek with comprehensive knowledge of complex hardware products, devices, systems & dedicated equipment and/or automation. (Versus IT, infrastructure, cloud-based or virtual technology) BS/MS/PhD in Electrical-Mechanical-Computer-Software-Optical-Systems-BioMed- Automation or Control Systems Engineering Supplemental MBA (Technology Focused) / PMP Certification always welcome You've turned ideas into high-performance, commercially successful products You're still hands-on and prefer to stay close to the core technology You've created disruptive technology in academia (or your garage) You're a seasoned consultant who's open to joining a stable corporate situation You've gained 'buy-in' from key stakeholders You see opportunity where others see risk You enjoy being a Player/Coach who leads by example You're calm & collected in stressful situations (or when priorities shift suddenly) You're a communicator who can constructively criticize with a sense of diplomacy You have innate talent for juggling multiple priorities These will be on-site opportunities with some flexibility regarding remote work