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Principal Project Engineer Jobs in California (NOW HIRING)

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Principal Project Engineer information

See California salary details

$73K

$145.3K

$209.7K

How much do principal project engineer jobs pay per year?

As of Aug 16, 2026, the average yearly pay for principal project engineer in California is $145,292.00, according to ZipRecruiter salary data. Most workers in this role earn between $116,900.00 and $170,700.00 per year, depending on experience, location, and employer.

What is a principal project engineer?

Principal Project Engineers are senior-level professionals responsible for leading and managing complex engineering projects from conception to completion. They oversee project teams, coordinate resources, ensure adherence to technical standards, and communicate with stakeholders to deliver projects on time and within budget. Their role often involves high-level decision-making, risk management, and providing technical guidance to other engineers. Additionally, they may help set project strategies and ensure compliance with safety and regulatory requirements.

How does a principal project engineer typically interact with cross-functional teams during a project's lifecycle?

A Principal Project Engineer plays a central role in coordinating efforts across various departments, such as design, manufacturing, quality assurance, and procurement. They lead technical discussions, ensure alignment on project goals, and resolve cross-functional challenges to keep the project on track. Effective communication, stakeholder management, and the ability to translate technical requirements between teams are crucial for success in this role. Regular meetings, progress updates, and collaborative problem-solving sessions are common aspects of their daily responsibilities.

What are the key skills and qualifications needed to thrive as a principal project engineer, and why are they important?

To thrive as a Principal Project Engineer, you need deep expertise in engineering principles, project management, and typically a bachelor’s or master’s degree in engineering with several years of relevant experience. Proficiency with project management software (such as MS Project or Primavera), CAD tools, and relevant industry certifications (like PMP or PE licensure) is often required. Leadership, problem-solving, and excellent communication skills help drive cross-functional teams and stakeholder alignment. These abilities are crucial for delivering complex projects on time, within budget, and to the required quality standards.

What is the difference between Principal Project Engineer vs Project Engineer?

AspectPrincipal Project EngineerProject Engineer
CredentialsTypically requires a Bachelor's degree in engineering and extensive experience; often professional engineer (PE) licenseBachelor's degree in engineering or related field; entry to mid-level experience
Work EnvironmentLeads large projects, oversees teams, and coordinates with stakeholdersSupports project tasks, manages specific project segments, reports to senior engineers
Industry UsageCommon in construction, oil & gas, and infrastructure sectorsUsed across various engineering fields for project execution

The Principal Project Engineer holds a senior leadership role, overseeing entire projects and teams, while the Project Engineer focuses on specific project tasks and supports project management. Both roles require engineering credentials, but the Principal Project Engineer typically has more experience and responsibilities.

Principal Project Engineer jobs near you
Infographic showing various Principal Project Engineer job openings in California as of August 2026, with employment types broken down into 85% Full Time, 9% Part Time, 2% Temporary, and 4% Contract. Highlights an 86% Physical, 5% Hybrid, and 9% Remote job distribution, with an average salary of $145,292 per year, or $69.9 per hour.

Senior Principal Project Engineer, Photonic System Development

Monarch Quantum

San Diego, CA • On-site

$160K - $240K/yr

Full-time

Medical, Dental, Vision, Retirement, PTO

Re-posted 7 days ago

Job description

Join our fast-paced and passionate team as a Senior Principal Project 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'll have the opportunity to work on cutting edge technologies, work closely with leadership, and develop and implement engineering practices that support our mission and growth. Your key responsibilities are as follows:
  • Leads planning and execution of development projects, responsible for project scope, schedule and budget. Represents the company in front of customers and collaborates with functional managers within Engineering and cross-functionally to assure successful project execution.
  • Manages matrixed technical team thru schedule bottlenecks, uncertainty, lack of information and sudden changes, while screening team from external turbulence and assuring highest productivity and focus on success.
  • Provides technical, logistical and problem-solving leadership, develops and employs best engineering practices. Anticipates risks and identifies opportunities, then manages both thru the projects.
  • Responsible for project execution per internally and customer defined processes, reaching, documenting and defending project milestones: requirement, design and test readiness reviews, integration and test events, test reports, installation and support activities.

Requirements
Experience:
  • Advanced degree in Engineering or a related field
  • 18 years or more of relevant experience (including pursuit of relevant higher education); ideally within a startup or technology company.

Skills:
  • Proven record of successfully leading a photonic system development project using structured development process.
  • Expert in a subset of technical areas: systems engineering, optics and photonics, AMO physics, control theory, opto-mechanics, electrical and software engineering.

Startup Mindset:
  • You're creative, flexible, and eager to wear multiple hats.
  • You're passionate about building systems from the ground up and comfortable with ambiguity and change.

Benefits
The expected annual salary range for this position is $160,000-$240,000.
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 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.

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