Mechanical Engineer Temporary Jobs in California

Job Title: Mechanical Engineer

Job Description

• Use Siemens NX CAD to perform advanced 3D modeling, manage large assemblies, and produce detailed engineering drawings that meet functional and quality requirements.
• Drive conceptual, preliminary, and detailed mechanical design activities, including material selection, architecture decisions, and preparation of comprehensive design documentation.
• Define, analyze, document, and manage product and project requirements throughout the entire development lifecycle.
• Conduct feasibility studies and technical evaluations to assess design approaches, identify risks, estimate costs, and determine implementation strategies.
• Collaborate with cross-functional engineering teams, suppliers, customers, and project stakeholders to deliver integrated mechanical and system-level solutions.
• Support subsystem integration activities, configuration management processes, and system-level performance validation efforts.
• Develop, execute, and support qualification, integration, production, and verification testing activities to ensure product quality, reliability, and performance.
• Lead technical problem solving and root cause investigations, and implement innovative engineering solutions to resolve complex issues.
• Provide technical leadership and guidance to a small mechanical engineering team, influencing design direction and promoting engineering best practices.
• Support project planning by contributing to work breakdown structures, effort estimations, risk identification, and schedule management.
• Document engineering decisions, specifications, assumptions, and design rationale to maintain accurate product records and enable future development and maintenance.
• Ensure compliance with safety, quality, and environmental standards while promoting safe and responsible engineering practices across the team.

Essential Skills

• Bachelor's degree in Mechanical Engineering or a related engineering discipline.
• 5+ years of experience as a Mechanical Engineer working on complex mechanical systems.
• Significant experience developing complex mechanical systems, modules, or subsystems from concept through implementation.
• Proficiency with Siemens NX CAD, including complex 3D modeling, large assemblies, and detailed drawing creation.
• Strong mechanical design engineering skills with a solid understanding of system-level interactions and subsystem integration.
• Experience leading technical design efforts and influencing engineering decisions within project teams.
• Ability to perform feasibility assessments and develop solutions for complex technical challenges.
• Experience working in cross-functional engineering environments involving multiple disciplines.
• Knowledge of product qualification, verification, and validation methodologies.
• Experience collaborating with suppliers and external stakeholders on technical and integration topics.
• Strong technical communication and documentation skills for clear reporting and design justification.
• Ability to balance technical quality, cost, schedule, and delivery objectives in project execution.

Additional Skills & Qualifications

• Experience with system integration activities and configuration management tools.
• Working knowledge of GD&T and advanced CAD modeling practices.
• Background in supplier management and coordination of engineering deliverables.
• Familiarity with risk assessment methods and mitigation strategies in engineering projects.
• Experience preparing and maintaining technical documentation throughout the product lifecycle.
• Exposure to project planning software and tools to support scheduling and resource estimation.
• Ability to mentor and guide other engineers, contributing to team development and best practices.
• Comfort working with multidisciplinary experts and stakeholders across multiple projects.

This is a Contract position based out of San Diego, CA.

The pay range for this position is $52.88 - $64.90/hr.

Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following: • Medical, dental & vision • Critical Illness, Accident, and Hospital • 401(k) Retirement Plan – Pre-tax and Roth post-tax contributions available • Life Insurance (Voluntary Life & AD&D for the employee and dependents) • Short and long-term disability • Health Spending Account (HSA) • Transportation benefits • Employee Assistance Program • Time Off/Leave (PTO, Vacation or Sick Leave)

This is a hybrid position in San Diego,CA.

This position is anticipated to close on Aug 18, 2026.

About Actalent

Actalent is a global leader in engineering and sciences services and talent solutions. We help visionary companies advance their engineering and science initiatives through access to specialized experts who drive scale, innovation and speed to market. With a network of almost 20,000 consultants and 5,000 clients across the U.S., Canada, Asia and Europe, Actalent serves many of the Fortune 500. We are proud to be an Engineering News-Record (ENR) Top 500 Design Firm for our engineering design services and a ClearlyRated Best of Staffing® winner for both client and talent service.

The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.

If you would like to request a reasonable accommodation, such as the modification or adjustment of the job application process or interviewing process due to a disability, please email actalentaccommodation@actalentservices.com for other accommodation options.

San Francisco Fair Chance Ordinance: Pursuant to the San Francisco Fair Chance Ordinance, for all positions located in the city and county of San Francisco, we will consider for employment qualified applicants with arrest and conviction records.

Massachusetts Lie Detector: It is unlawful in Massachusetts to require or administer a lie detector test as a condition of employment or continued employment. An employer who violates this law shall be subject to criminal penalties and civil liability.

Use of Artificial Intelligence (AI): We may use Artificial Intelligence (AI) to support parts of our hiring process, including sourcing, screening, and evaluating candidates. AI helps assess applications and qualifications, but final decisions are made by our hiring team. By applying, you acknowledge and agree that your application may be reviewed using AI tools.