Senior Electro-Mechanical Engineer

Monarch Quantum; San Diego (CA); On-site; USD 125,000 - 175,000; Full time

Benefits offered by this job

Medical, Dental, Vision insurance

401(k) with 4% match

20 PTO days per year

13 paid holidays

9/80 work schedule

Job summary

Monarch Quantum seeks a Senior Electro-Mechanical Engineer to help build our foundation from the ground up in a fast-paced startup. This role blends mechanical design, electrical routing, and thermal management to ensure robust photonics systems.

You will collaborate with EE/ME teams, mentor junior engineers, and implement engineering practices that meet demanding performance and reliability goals.

Qualifications

• Bachelor's degree in mechanical engineering, physics, or related field.
• Minimum 5 years of relevant experience, preferably in startup/tech.
• U.S. person for export-controlled information.

Responsibilities

• Specify and source high-density electrical/fiber connectors and backplanes.
• Design 3D routing for power, signal cabling, and fiber patches in 19-inch racks.
• Develop EMI shielding and segregation to protect photonics signals.
• Collaborate with EE/ME to co-design PCBs and ensure correct pinouts.
• Maintain BOMs and perform thermal/structural analyses for reliability.

Skills

Electro-Mechanical design

3D routing

EMI shielding

Mentorship

Cross-functional collaboration

Education

Bachelor's in Mechanical Engineering

Physics or related field

Master's degree preferred

Tools

SolidWorks

Python

Matlab

ANSYS Workbench

Job description

Join our fast-paced and passionate team as aSeniorElectro-Mechanical Engineer. As we scale, you will be instrumental in building our foundation from the ground up. This is a dynamic, hands‑on role for a self‑starter who thrives in a fluid startup environment.You'llhave the opportunity to work oncutting edgetechnologies, work closely with leadership, and develop and implement engineering practices that support our mission and growth. Your key responsibilities are as follows:

• Work independently and in a team while communicating with the manager, projectengineerand the teammates. Will mentor junior engineers.

• Execute complex engineering tasks involving planning, preparation, data/information collection and analysis and decision‑making in a process involving peer reviews and documentation of the results.

• Use tenacity, patience,self‑disciplineand passion for excellence to assure accuracy of execution schedule, data quality/integrity, conformance to company best practices, clarity in communication and documentation.

• Use every opportunity to grow competency throughmentorship, curiosity, communication,exposureand initiative.

• This position requires access to export‑controlled information. Employment is contingent upon the applicant being a U.S. person as defined by 8 U.S.C. § 1324b(a)(3).

Experience:

• A bachelor’s degree in mechanical engineering, Physics, or a related field.Masterspreferred.

• Minimum of 5 years of relevant experience, ideally within a startup or technology company.

Skillsand Responsibilities:

Interconnect & Component Specification

• Specify and source high‑density electrical connectors, RF co‑axial connectors, optical fiber connectors (e.g., MPO, LC), and hybrid electro‑optical backplanes.

• Define cable bundle characteristics, including wire gauge (AWG), shielding (EMI/RFI protection), bend radii (especially critical for fiber optics), and jacket materialsappropriate forthermal and regulatory compliance.

• Manage andmaintainthe Electro‑Mechanical Bill of Materials (BOM), ensuring all connectors, strain reliefs, and cable assemblies are fully documented and sourced.

Electro‑Mechanical Integration & Cable Routing

• Design complex 3D routing pathways for both electrical power/signal cabling and sensitive fiber optic patch cords within standard 19‑inch racks or custom enclosures.

• Implement effective strain relief, cable management arms, and routing accessories to ensure reliability during system servicing and slide‑out rack operations.

• Incorporate strict Electro‑Magnetic Interference (EMI) shielding and segregation practices to prevent power cables from disrupting sensitive photonics signals.

Cross‑Functional EE/ME Collaboration

• Act as the primary engineering bridge to the Electrical Engineering team, co‑designing physical PCBs to enclosure interfaces,ensuring pinouts match physical connector layouts, and ensuring adequate high stability cooling.

• Translate electrical schematics and block diagrams into physical wire lists, cable drawings, and schematic‑to‑3D routing layouts.

• Collaborate on power distribution unit (PDU) placement, busbar routing, and grounding/bonding strategies for the entire rack.

Structural & Thermal Design for Photonics

• Design ruggedsheet metalrack enclosures, sub‑chassis, and mounting brackets capable of supporting heavy components while minimizing structural vibrationto internal photonics modules.

• Collaborate on thermal management strategies (forced air, liquid cooling, or thermoelectric coolers) to ensure the precise temperature stability required by photonics components.

• Conduct or supervise tolerance stack‑up analyses for high‑density blind‑mate connections on backplanes.

• Demonstrated successful execution of engineering tasks including use of mechanical CAD (SolidWorks preferred) and quantitative analysis/programming tools (Python,Matlab),and finite elementanalysistools(ANSYS Workbenchor similar).

Startup Mindset:

• You'recreative, flexible, and eager to wear multiple hats.

• You'repassionate about building systems from the ground up and comfortable with ambiguity and change.

The expected annual salary range for this position is $125,000-$175,000.

As a full‑time employee, you will be eligible for Monarch’s comprehensive benefits package, which includes:

• Medical, Dental, and Vision insurance
• Fidelity 401(k) plan with 4% employer matching
• 20 paid time off (PTO) days per year
• 13 paid company holidays
• 9/80 work schedule (every other Friday off)

Monarch Quantum is proud to be an equal opportunity employer and does not discriminate on the basis of race, color, citizenship status, national origin, ancestry, sex, sexual orientation, age, religion, creed, physical or mental disability, medical condition, marital status, veteran status or any other characteristics protected under applicable federal, state and local laws.