This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Sr. Staff Mechanical Engineer - BlueSky based in the United States. This is a fully remote, full-time engineering opportunity focused on developing advanced aerospace hardware from early concepts through real-world deployment. You will take ownership of mechanical engineering deliverables across the complete product lifecycle, combining design, analysis, prototyping, testing, production, and field support. The role offers significant hands-on involvement with CAD, structural analysis, materials, manufacturing, and mechanical integration. You will work closely with Engineering, Manufacturing, Quality, Supply Chain, and Program Management teams to deliver robust and production-ready systems. The environment is fast-paced and execution-oriented, requiring engineers who can solve complex technical problems and make sound decisions under pressure. You will also provide direct technical support during testing, demonstrations, and field operations, rapidly addressing issues and implementing effective design improvements. This role is ideal for an experienced aerospace mechanical engineer motivated by challenging hardware problems and mission-critical technology.