At Northrop Grumman, our employees have incredible opportunities to work on revolutionary systems that impact people's lives around the world today, and for generations to come. Our pioneering and inventive spirit has enabled us to be at the forefront of many technological advancements in our nation's history - from the first flight across the Atlantic Ocean, to stealth bombers, to landing on the moon. We look for people who have bold new ideas, courage and a pioneering spirit to join forces to invent the future, and have fun along the way. Our culture thrives on intellectual curiosity, cognitive diversity and bringing your whole self to work — and we have an insatiable drive to do what others think is impossible. Our employees are not only part of history, they're making history. Northrop Grumman Defense Systems is seeking a Sr. Principal Mechanical Engineer (Level 4). This position is located on-site in Roy, Utah and supports the GSSC program. This position is in our Ground Mechanical Sustainment Team of the Minuteman III Intercontinental Ballistic Missile (ICBM) System in support of the Ground Systems Sustainment Contract (GSSC) program and the United States Air Force (USAF) customer.