Senior Mechanical Engineer

Willdan • Walnut, CA

46d • Onsite

About The Position

Willdan Performance Engineering, a subsidiary of Willdan, is seeking a Senior Mechanical Engineer in Walnut, CA. This position is critical to maintaining operational continuity, supporting organizational growth, and ensuring the delivery of high-quality engineering services that exceed client expectations. Having extensive practical experience in mechanical engineering is important to effectively provide day-to-day operational, technical, and project leadership. The Senior Mechanical Engineer will be responsible for managing engineering staff, supporting business pursuits, overseeing design delivery within budget, and ensuring quality assurance/quality control (QA/QC) standards are met across projects. The Senior Mechanical Engineer must be able to manage multiple priorities in a fast-paced environment and serve as the Mechanical Engineer of Record.

Requirements

• Bachelor’s degree in mechanical engineering (master’s degree is preferrable).
• Active California Professional Engineer License (other States a plus) with no pending adverse actions.
• Possess NCEES Record.
• Demonstrated experience in consulting engineering and multidisciplinary project delivery.
• Minimum of 10 to 15+ years of senior engineering design experience.
• Experience with data centers and process cooling and heating systems controls or central plant systems, along with associated plumbing design.
• Familiarity with QA/QC programs and technical standards implementation.
• Prior leadership, mentoring, and supervisory experience.
• Experience writing proposals and supporting business development efforts.
• Travel may be required depending on project needs.
• Design and Development
• Strong Analytical Skills
• Technical Leadership
• Technical Documentation
• Troubleshooting
• Organization and Project Management
• Communication
• Interdisciplinary Collaboration
• Client Liaison

Nice To Haves

• master’s degree is preferrable
• Other States a plus

Responsibilities

• Manage daily operations of the WES Industrial Engineering Department.
• Coordinate workloads, staffing assignments, and resource planning to support on-time project delivery.
• Provide guidance, technical support, and mentorship to engineers and designers.
• Perform project technical reviews to ensure compliance with applicable codes, standards, and client requirements.
• Resolve complex technical challenges and design coordination issues.
• Support troubleshooting and system optimization efforts.
• Provide senior-level engineering oversight for mechanical, plumbing, and controls design projects.
• Work with and manage a multi-disciplinary subconsultant team of electrical engineers, civil engineers, structural engineers, architects, and other disciplines as required for projects.
• Perform site assessments (as needed) and coordinate with clients, contractors, and regulatory agencies.
• Assist with construction administration support including RFIs, submittmits, and field coordination.
• Support staff development, training, and performance improvement initiatives.
• Foster a collaborative and accountable team environment.
• Enforce internal QA/QC procedures and technical standards.
• Perform peer reviews and final design quality checks prior to issuance.
• Maintain engineering standards, templates, and best practices.
• Assist with project scope development, fee estimating, staffing plans, schedule development, and risk assessments.
• Prepare technical narratives.
• Support presentations and technical interviews as needed.
• Must be proficient in AutoCAD / Revit / BIM platforms, Energy modeling and engineering analysis tools, and Microsoft Office Suite.

Benefits

• Willdan is an equal opportunity employer.
• Willdan does not discriminate on the basis of physical or mental disability where the essential functions of the job can be reasonably accommodated.
• Determinations on requests for reasonable accommodation will be made on a case-by-case basis.
• If you need reasonable accommodation for any part of the application and hiring process, please notify us.
• Willdan Energy Solutions participates in E-Verify.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior