Project Design Engineer - Mechanical

Ethos•Irvine, CA

1d•Hybrid

About The Position

Ethos is seeking a motivated Project Design Engineer - Mechanical with 3–5 years of experience in mechanical design engineering within building services to join our Engineering Studio. The Engineering Studio supports multiple projects across various sectors including data centres, industrial, energy, pharmaceutical, and commercial. As a Project Design Engineer, you will play a key role in delivering high-quality mechanical design solutions for building services projects in commercial, healthcare, and mission-critical environments. You will operate under limited supervision, take ownership of project tasks, and lead smaller projects from concept to completion.

Requirements

Proficient in mechanical building services design, including HVAC, water systems, and fire protection.
Competent in design documentation and coordination using tools such as: Microsoft Office Suite, AutoCAD and Revit MEP, Bluebeam for drawing review and mark-up.
In-depth knowledge of applicable standards: CIBSE, ASHRAE, BS, IS, and EN.
Strong understanding of lifecycle design documentation, QA systems, and project file management.
Typically 3–5 years of experience in mechanical design engineering within building services consultancy.
Degree in Mechanical Engineering or Building Services Engineering (or equivalent).
Working towards Chartered Engineer status (CEng) with Engineers Ireland or equivalent.
Demonstrated ability to manage competing deadlines and multiple tasks efficiently.
Strong interpersonal and communication skills; able to engage confidently with clients, contractors, and internal teams.
Excellent organisational skills with a proactive and structured approach to task management.
Adaptable and able to switch seamlessly between tasks and responsibilities.
Analytical thinker with problem-solving skills and the ability to make sound technical judgments.
Team-oriented, collaborative mindset with a drive to support both technical excellence and team culture.

Nice To Haves

Familiarity with mechanical analysis software (e.g. Hevacomp, IES, or similar) is an advantage.
Experience managing or mentoring junior engineers is desirable.

Responsibilities

Oversee specific elements of design work and coordinate with other disciplines; may supervise junior staff on assigned tasks.
Champion quality assurance (QA) across projects, performing audits and promoting compliance with internal QA systems.
Manage and maintain the project mechanical design file and contribute to the evolution of mechanical design standards.
Take technical ownership of mechanical systems throughout the full project lifecycle — from concept design to commissioning and handover.
Ensure continuous quality control of design and installation, aligning with CIBSE, ASHRAE, BS, IS, and EN standards.
Develop detailed mechanical specifications, tender packages, and reports, including value engineering analysis and client recommendations.
Liaise proactively with clients, contractors, and suppliers to resolve technical challenges during project delivery.
Support and mentor junior engineers, contributing to their professional development and team growth.
Promote a positive and proactive message internally and externally through consistent communication and behaviour.

Benefits

Flexible working times
20 Days holidays up to 25 days
Pension Scheme
Refer a Friend scheme
Healthcare check-ups and flu vaccinations
Gym / Fitness membership Allowance
Subsidised Health Insurance Allowance
Working travel out-of-pocket expenses
Travel tax scheme or bike-to-work scheme
Regular training/mentoring / further college support
Support for Chartership
A Professional Subscription Fee paid by the company
Paid Statutory Leaves
Heavily subsidised social committee
Flexible Fridays and a 9-day fortnight working schedule
Opportunities to develop your skills, broaden your experience, and build your career.
Support toward professional accreditation.