Senior / Staff Rotor Dynamics Engineer

About ZiplineZipline is the world’s largest and most experienced drone delivery service. We are on a mission to serve all humans equally by ensuring access to food, medicine and essential goods anytime, anywhere. We design, build, and operate the world’s largest autonomous logistics system, delivering critical supplies quickly and reliably. Today, Zipline operates on four continents, makes a delivery somewhere in the world every 30 seconds, and has completed millions of deliveries to date, including blood, vaccines, medical supplies, food, and retail products. Our customers include the world’s largest and most prominent healthcare systems, governments, retailers, restaurants and global businesses who rely on us to save lives, reduce emissions, increase economic opportunity, and provide delivery from point A to point B as fast as possible. The drone is only 15% of what we’ve built to enable seamless, reliable, global operations.Our system strengthens supply chains, reduces congestion, and gives people time back. With more than 140 million commercial autonomous miles safely flown, Zipline is redefining access to healthcare, consumer products, and food across the globe.We operate at a global scale and are looking for practical problem solvers who thrive on real-world challenges and rapid growth. Our team is motivated by building systems that have a direct, meaningful impact on people’s lives and by scaling the future of logistics. We are seeking people who sculpt from first principles, enjoy facing adversity, and can do the impossible at record breaking speeds.About You and The RoleIn this role, you will use your rotordynamics expertise to drive hardware and product design decisions. You will be responsible for the development and definition of rotor and propeller load cases, including setting and upholding analysis requirements, processes, and standards. You will conduct rotordynamics analyses and lead tight design-test-analysis loops to keep our delivery aircraft safe, light, and scalable. This role works closely with structures, aerodynamics, GNC, systems, and powertrain engineers to drive rotor system requirements and rotorcraft vehicle configuration decisions to achieve product level outcomes.How to know if it's you: Pencil and paper calculations are always your first step, you prefer simple and fast over detailed and large, and you’re excited to get hands on with hardware. On any given day you could be driving design trade studies, supporting flight tests to validate analysis, or working across disciplines to tackle complex system level challenges.Zipline was founded by engineers dedicated to making the world a better place. We are building a new global industry and are looking for a talented engineer who takes a hands-on approach and will use analysis to drive design. The ideal candidate will be someone who excels in a fast paced, dynamic environment and is excited to own and drive simple, elegant solutions to complex problems.What You'll DoOwn loads development for the propellers on Zipline’s aircraftPerform dynamic analyses of aircraft propellers, including structural modes, forced harmonic vibration, and rotordynamics simulationsDefine rotorcraft loads requirements that support flight performance and vehicle safetyBuild finite element models of propellers and powertrain components for structural and loads analysesWork with the aerodynamics and mechanical engineering teams to design high performance propeller and rotor bladesCollaborate across hardware, software, and vehicle operations to drive rotorcraft configuration and performance decisionsEvaluate static strength and fatigue life of dynamic system components, including rotor assemblies, propeller blades, and motor shafts.Execute propeller and aircraft testing from start-to-finish including pre-test analysis, instrumentation, testing, data analysis, signal processing and model correlation. Success will require a hands-on approach and quality time in wind tunnels, the vibration test lab, and on the flight lineLevel-up the engineering organization by providing mentorship, guidance, best practices, and building standardized in-house tools and processesWhat You'll BringBachelor’s degree in aerospace engineering, mechanical engineering, or related field7+ years of industry experience in design and analysis of rotor and vehicle structures. Preference for experience developing loads for eVTOL vehiclesExpertise in helicopter/rotorcraft aeromechanics, including aerodynamics, dynamics, loads, stability, and performanceDeep knowledge of RCAS, CAMRAD II, FlightLab, Dyrobes Rotor, or other comprehensive rotor analysis codesExperience with FEMAP/NASTRAN, Siemens Simcenter, or other finite element softwareAnalytical/scientific programming experience (Python, MATLAB)Must-have traits: clear owner mentality with rapid decision cadence, tolerance for ambiguity and shifting configurations, disciplined documentation habits, and excellent hardware intuitionLocation: role is based in South San Francisco, CATravel to field sites and test ranges is typically <10% depending on program phaseMust be eligible to work in the USWhat Else You Need To KnowThe starting salary range for this role is $150,000 - $215,000. Zipline is an equal opportunity employer and prohibits discrimination and harassment of any type without regard to race, color, religion, age, sex, national origin, disability status, genetics, protected veteran status, sexual orientation, gender identity or expression, or any other characteristic protected by federal, state or local laws or our own sensibilities.We value diversity at Zipline and welcome applications from those who are traditionally underrepresented in tech. If you like the sound of this position but are not sure if you are the perfect fit, please apply!Voluntary Self-IdentificationFor government reporting purposes, we ask candidates to respond to the below self-identification survey. Completion of the form is entirely voluntary. Whatever your decision, it will not be considered in the hiring process or thereafter. Any information that you do provide will be recorded and maintained in a confidential file.As set forth in Zipline ’s Equal Employment Opportunity policy, we do not discriminate on the basis of any protected group status under any applicable law.