Senior Specialist, Mechanical Engineer

FISICA; Strathearn (CA); On-site; USD 100,000 - 186,000; Full time

Benefits offered by this job

Competitive salary and benefits

Generous paid time off

401k with 6% match

Strong work-life balance

Tuition Reimbursement

Paid paternal leave

Job summary

Fisica, Inc. in Simi Valley, CA is seeking a Senior Specialist, Mechanical Engineer to lead design and testing of mechanical and electro‑mechanical battery systems.

You will drive full‑cycle development from concept through production and work closely with electrical engineers on BMS concepts in a hands‑on environment. You will collaborate with customers in weekly reviews, develop test procedures, and perform root‑cause analyses across multiple programs while ensuring safety and compliance.

Qualifications

• Bachelor’s degree in mechanical or electrical engineering with 6 years of experience.
• SolidWorks 3D CAD with 3D visualization; CREO a plus; ASME Y14.5 knowledge.
• Experience with FEA (Ansys) for thermal, shock and vibration analyses.
• Ability to design, test and document mechanical systems; strong writing skills.
• Security clearance ability; U.S. citizenship required.

Responsibilities

• Full-cycle development of battery and charger products from concept to production.
• Design, develop, analyze, and test battery and charger products for rugged use.
• Support BMS designs and provide feedback on customer proposals.
• Collaborate with customers; present work in meetings and design reviews.
• Develop testing approaches; create procedures and documentation; perform battery testing.
• Conduct failure and root-cause analyses.
• Support multiple programs simultaneously.

Skills

Battery design

FEA simulation

3D CAD visualization

Technical writing

Customer collaboration

Electrical grounding

Education

Bachelor's degree in Mechanical Engineering

6 years of experience

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.

Senior Specialist, Mechanical Engineer

2200 Mechanical Engineering Full Time Simi Valley, CA, US

2 days ago Requisition ID: 1220

Salary Range: $100,000.00 To $185,500.00 Annually

Job Title: Sr. Specialist, Mechanical Engineer

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

Business Unit: Space Vector

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.

Job Description:

Position Overview

Responsible for the design, layout, testing and evaluation of mechanical and electro‑mechanical devices or systems. Prepares design specifications, analysis and recommendations for presentation and approval. Analyzes mechanical requirements to determine feasibility of design within time and cost constraints. Investigates solutions to product or process problems. Consolidates results of mechanical design elements for assigned projects. Conducts investigations involving the origination or modification of material, component or process specifications or requirements. Performs product development activities including drawing board layout and interpretation/implementation of customer specifications and documentation requirements.

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 6 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).
• Experience in electronic circuit design (preferred).
• 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.

Why Join Fisica, Inc.:

• Competitive salary and benefits package!
• Generous paid time off.
• 401k with 6% match and vesting is immediate.
• Strong work‑life balance.
• Tuition Reimbursement.
• Paid paternal leave.

In compliance with pay transparency requirements, the salary range for this role is $100,000 - $185,500. 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.

Fisica is an E‑Verify Employer. Please click here for the E‑Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish .

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

Job Title: Sr. Specialist, Mechanical Engineer

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

Business Unit: Space Vector

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.

Job Description:

Position Overview

Responsible for the design, layout, testing and evaluation of mechanical and electro‑mechanical devices or systems. Prepares design specifications, analysis and recommendations for presentation and approval. Analyzes mechanical requirements to determine feasibility of design within time and cost constraints. Investigates solutions to product or process problems. Consolidates results of mechanical design elements for assigned projects. Conducts investigations involving the origination or modification of material, component or process specifications or requirements. Performs product development activities including drawing board layout and interpretation/implementation of customer specifications and documentation requirements.

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 6 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).
• Experience in electronic circuit design (preferred).
• 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.

Why Join Fisica, Inc.:

• Competitive salary and benefits package!
• Generous paid time off.
• 401k with 6% match and vesting is immediate.
• Strong work‑life balance.
• Tuition Reimbursement.
• Paid paternal leave.

In compliance with pay transparency requirements, the salary range for this role is $100,000 - $185,500. 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.

Fisica is an E‑Verify Employer. Please click here for the E‑Verify Poster in English or Spanish. For information regarding your Right To Work, please click here for English or Spanish .

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