Specialist, Mechanical Engineer

Fisica; Simi Valley (CA); On-site; USD 87,000 - 161,000; Full time

Benefits offered by this job

Relocation stipend

401(k)

PTO

EAP

Company-paid holidays

Job summary

Fisica, Inc. is seeking a Specialist, Mechanical Engineer to lead full-cycle development of battery and charger products from concept to production in Simi Valley, CA.

The role focuses on high-energy-dense battery solutions for rugged terrain and involves close collaboration with Electrical Engineers and customers. You will support BMS designs, perform tests and analyses, and contribute to design reviews and compliance activities.

Qualifications

• Bachelor’s degree in mechanical or electrical engineering with 5 years of experience.
• SolidWorks 3D CAD with Creo knowledge; ASME Y14.5 drafting.
• FEA simulations for thermal, shock and vibration; Ansys preferred.
• Ability to design, test and run experiments; strong technical writing.
• Proficiency in MS Office (Email, Word, Excel).

Responsibilities

• Full-cycle development of battery and charger products from concept to production.
• Design, develop, analyze, and test battery and charger products for rugged terrain.
• Support BMS designs; provide feedback on proposals with basic battery concepts.
• Collaborate with customers to capture requirements and present progress in reviews.
• Develop testing approaches; create detailed procedures and documentation; perform battery testing.
• Conduct failure and root cause analyses; support multiple programs simultaneously.

Skills

3D CAD visualization

Technical writing

Customer collaboration

Testing and experiments

Education

Bachelor's degree in Mechanical/Electrical Engineering

Tools

SolidWorks

Creo

Ansys

MS Office

Job description

If you are unable to complete this application due to a disability, contact this employer to ask for an accommodation or an alternative application process.

Specialist, Mechanical Engineer

Full Time Simi Valley, CA, US

3 days ago Requisition ID: 1196

Salary Range: $87,000.00 To $161,000.00 Annually

Job Title: Specialist, Mechanical Engineer

Job Location: Simi Valley, CA (This position is 100% onsite)

Business Unit: Fiscia - Space Vector

9/80: Employees work 9 out of every 14 days – totaling 80 hours worked – and have every other Friday off.

Fisica, Inc. is a premier manufacturer of advanced defense products, specializing in the design and production of airborne and ground-based antennas, as well as cutting‑edge electromagnetic systems and simulators. Headquartered in San Leandro, California, with additional operations in Simi Valley, Fisica plays a vital role as a trusted partner to leading defense primes and the U.S. Department of Defense.

Our company operates as - ATI, Randtron, Datron and Space Vector—each bringing deep expertise and innovation to the defense sector. Led by a seasoned management team, Fisica is committed to excellence in engineering, manufacturing, and mission‑critical solutions that enhance national security.

At Fisica, we foster a strong, collaborative work culture that values individual contributions and empowers our employees. Our commitment to innovation, integrity, and teamwork makes us a leader in the defense industry and an exceptional place to build a career.

This is an opportunity to join a fast‑paced, dynamic small company environment to work on programs that make a difference to the United States and our allies. Your experience in Battery Engineering and BMS will be a great value‑add to our team as we continue to expand our largest product line at the company. Your impact on our success and growth will be daily and direct. You will be joining an experienced and collaborative team that can support your appetite for continuous improvement, regardless of where you are in your career journey.

Responsibilities:

• Full-cycle development of battery and charger products from concept to production.
• Design, develop, analyze, and test new and existing battery and charger products, typically high-energy-dense battery solutions for rugged terrain.
• Support Electrical Engineers with Battery Management System (BMS) designs; provide feedback on proposals with basic battery concepts, working towards requirement analyses and compliance matrixes.
• Work shoulder-to-shoulder with customers to understand key requirements and derive critical features into your design approach; this may involve presenting your work products to customers in weekly status meetings or formal design reviews.
• Develop a testing approach in collaboration with the customer; create detailed test procedures and other supporting documentation; shepherd customers through the customer review process. You will be physically performing battery testing in a lab or outside test facility.
• Perform failure and root cause analyses.
• Support multiple programs simultaneously.

Education, Experience, and Qualifications:

• Bachelor’s degree in mechanical engineering, Electrical Engineering, or a similar discipline with 5 years of experience.
• SolidWorks 3D CAD with the strong ability to visualize and design in 3D. Drafting proficiency with knowledge of ASME Y14.5 (CREO experience is a plus).
• Experience in FEA simulation encompassing thermal, shock, and vibration (Ansys preferred).
• Proven ability to design, tests and experiments – support testing of the design.
• Strong technical writing skills.
• Proficient with MS Office Suite (Email, Word, Excel).

• This role requires the ability to obtain a future Security Clearance is required for the role. U.S. citizenship is required, as only U.S. citizens are eligible for a security clearance.

Preferred Qualifications:

• At least 3-5 years of hands‑on experience in advanced battery pack design using cylindrical or pouch cells; this includes strong knowledge of battery cell attachment methods, power electronics packaging, and bus bar design and an understanding of battery BMS fundamentals. Similar experience in electronic enclosure packaging by understanding the wiring diagram and schematics will also be considered.
• An understanding of how to design for safety in mechanical battery packs.
• Performing requirements analysis/compliance matrix – capture and execute customer’s requirements to completion.

In compliance with pay transparency requirements, the salary range for this role is $87,000 - $161,000. This is not a guarantee of compensation or salary, as final offer amount may vary based on factors including but not limited to experience and geographic location. Fisica Inc. also offers a variety of benefits, including relocation stipend, 401(k), PTO, EAP, and company-paid holidays. The specific programs and options available to an employee may vary depending on date of hire, and schedule type.

EEO Statement

Fisica is proud to be an Equal Opportunity Employer. Fisica is committed to treating all employees and applicants for employment with respect and dignity and maintaining a workplace that is free from unlawful discrimination. All applicants will be considered for employment without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender (including pregnancy, childbirth, breastfeeding or other related medical conditions), gender identity, gender expression, sexual orientation, marital status, military and veteran status, disability, genetic information, citizenship status, characteristic or membership in any other group protected by federal, state or local laws. Fisica maintains a drug‑free workplace and performs pre‑employment substance abuse testing and background checks, where permitted by law.