What are your career goals within machining, and how will this position fit with those goals?
Is this particular position a good fit? Is it a step up in your career or - a stagnant move that you are just complacent with taking until something better comes along? Assure the interviewer that this position will be challenging for you, is a step upward, and that it fits with your overall career goals.
"My primary goal in my career as a machinist is to gain further certifications, and stronger leadership experience so that I can eventually run my own team and shift. I feel that what your organization offers is a strong path towards those goals and I am excited for what this position has to offer."