Senior Engineer II, Mechanical​/Dispersion Systems

The Role

We are seeking a highly motivated, proactive, and detail-oriented Sr. Engineer II, Mechanical/Dispersion Systems to lead the design and development of aerosol dispersal systems. This role will own the mechanical design and performance of systems that control the release and distribution of particulate materials in real-world trials.

The ideal candidate combines strong fundamentals in fluid/particle dynamics with hands‑on experience building and iterating physical systems. The individual will work cross‑functionally with scientists, engineers, and external partners to translate novel materials into robust hardware. Success requires comfort operating in a fast‑paced, experimental environment and the ability to independently drive complex engineering efforts from concept through deployment.

• Lead the design and development of dispersion systems, owning mechanical performance from concept through prototyping and validation.
• Design and optimize particle and fluid handling systems, including mechanisms for controlled release, flow regulation, and dispersal behavior.
• Develop hardware intended for integration with mobile and diverse platforms, accounting for size, weight, power, and environmental constraints.
• Rapidly prototype and iterate on designs using hands‑on build methods (e.g. 3D printing, machining) with a strong emphasis on learning and designing through experimentation.
• Design and execute bench‑scale tests to evaluate system performance, including flow rates, particle distribution, and repeatability.
• Work with external manufacturers and machine shops to fabricate components, refine designs for manufacturability, and scale builds.

• Bachelor’s degree in mechanical, aerospace or related engineering discipline with 8+ years of relevant industry experience, or Master’s degree with 6+ years of experience, or PhD with 3+ years of experience.
• Strong foundation in fluid dynamics and particle behavior with experience designing systems involving spray or particulate dispersion.
• Demonstrated ability to own end‑to‑end mechanical design from concept -> prototype -> testing -> iteration.
• Proficiency in 3D CAD tools (Solid Works, Fusion, OnShape).
• Must be available for onsite employment in North Denver/Boulder Metro, Colorado.
• Initiative and ability to manage multiple, competing priorities, to think strategically and execute methodically.
• Strong organizational and project management skills, with the ability to independently drive initiatives in a fast‑paced environment.
• Excellent communication and documentation skills, with the ability to clearly articulate design decisions and tradeoffs.

Location: Boulder, CO

Salary Range: $120,000 - $164,500. Compensation for the role will depend on a number of factors, including a candidate’s qualifications, skills, competencies, and experience.

Protocos currently offers healthcare coverage, annual incentive program, retirement benefits and a broad range of other benefits.

We are an equal opportunity employer
. All qualified applicants will be considered for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status, or any other characteristic protected by law.

We recognize that great candidates often bring unique strengths without fulfilling every qualification. If you have some of the experience listed above but not all, please apply anyway. We are dedicated to building diverse and inclusive teams and look forward to learning more about your background and interest in Flagship.