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's Defense Systems sector is seeking a Principal Mechanical Engineer/Sr. Principal Mechanical Engineer to join a multi-functional team of Electrical, Mechanical, and Systems Engineers in Roy, UT. This position is in our Strategic Deterrent Systems Division to execute the Engineering and Manufacturing Development phase of the Sentinel Program. This role may offer a competitive relocation assistance package. The primary objective of this role is to collaborate across Systems Engineering, System Test, Global Supply Chain, suppliers, and other Integrated Product Teams (IPTs) to develop and review Environmental Control System hardware requirements, specifications, designs, trade studies, and analyses for the purpose of supporting incremental system maturity milestones and hardware deliveries. The successful candidate will be comfortable with working in a dynamic people-focused environment and collaborating across multiple internal and external stakeholders in order to achieve organizational goals.