Senior Mechanical Design Engineer (MEP)

Interface Engineering, Inc.; Washington (District of Columbia); Hybrid; USD 102,000 - 159,000; Full time

Benefits offered by this job

Employee Stock Ownership Plan (ESOP)

401(k) and comprehensive benefits

Paid time off and company holidays

Job summary

Interface Engineering, Inc. is seeking a Senior Mechanical Design Engineer (MEP) in Washington, DC with a hybrid work setup. The role leads HVAC design and coordination across projects, guiding a team and engaging with clients to deliver high-performance, code-compliant solutions.

Requirements include a BS in Mechanical Engineering, 10+ years of MEP/AEC experience, PE license, and strong knowledge of codes. Preferred LEED accreditation and IES-VE familiarity.

Qualifications

• BS/Mechanical Engineering or equivalent experience.
• Professional Engineering License required.
• 10+ years of MEP/AEC design and consulting experience.
• Advanced knowledge of HVAC systems in public safety, educational, and commercial sectors.
• Knowledge of industry codes and standards.
• Demonstrated interaction with clients in meetings or presentations.

Responsibilities

• HVAC system selection, engineering & design.
• Preparation of HVAC drawings, analyses, specifications, and calculations.
• Demonstrate excellent communication skills.
• Provide oversight of HVAC support staff.
• Provide construction administration & site observations related to projects.
• Provide exemplary service to team members and clients.

Skills

MEP/AEC design experience

HVAC systems knowledge

Client interaction

Industry codes & standards

LEED Accreditation

IES-VE knowledge

Education

BS/Mechanical Engineering, or equivalent experience

Professional Engineering License

Job description

Join a People-First, Employee-Owned Firm That’s Redefining Flexibility and Growth

Senior Mechanical Design Engineer (MEP) – Washington, DC (Hybrid)

Interface Engineering Inc.

(Relocation will be offered for highly qualified candidates)

At Interface Engineering, we believe your career should be as dynamic and rewarding as the projects you support. As a 100% employee-owned firm, we’re proud to offer our Collaboration from Home policy—giving you the flexibility of a hybrid schedule (2 days in-office per week minimum) while staying connected to a team that values innovation, inclusion, and impact.

Why Interface?

We’re not just engineers—we’re collaborators, mentors, and trailblazers in high-performance design. Our Pathway to Leadership program offers a transparent, personalized roadmap for career advancement, empowering you to grow in the direction that excites you most.

Our Culture

Interface has the company culture and work environment you have been seeking! You’ll find a workplace with a culture of fun, superior work/life balance benefits, expansive personal development opportunities, cutting-edge technology, and great relationships. You’ll work alongside MEP industry leaders who will help you develop your own thriving career path. Our work takes us around the globe and on a steady growth curve. Our success and innovation are powered by people like you!

Our Core Values

• We are Conscientious.
• We are Empowered.
• We are Respectful.
• We are Transformative.
• We are Resilient.

Key Responsibilities

As a Senior Mechanical Design Engineer (MEP) at Interface, you will be taking ownership as a discipline lead on multiple projects. Your duties will include (but may not be limited to):

• HVAC system selection, engineering & design.
• Preparation of HVAC drawings, analysis, specifications, and calculations.
• Demonstrate excellent communication skills.
• Provide oversight of HVAC support staff.
• Provide construction administration & site observations related to your projects.
• Provide exemplary service to team members and clients.

Required

What You'll Bring:

• BS/Mechanical Engineering, or equivalent experience.
• A Professional Engineering License
• 10+ years' MEP/AEC design and consulting experience.
• Advanced knowledge of HVAC systems in public safety, educational, and commercial sectors.
• Knowledge of industry codes and standards
• Demonstrated interaction with clients in meetings or presentations

Preferred

• LEED Accreditation
• Working IES-VE knowledge

What You’ll Love

• Competitive Pay: $102,431 to $159,339 annual salary and conditional bonus
• Employee Ownership: Build equity through our Employee Stock Ownership Plan (ESOP)
• Robust Benefits: 401(k), medical/dental/vision, life & disability insurance, transportation benefits...and more!
• Generous Time Off: PTO, paid holidays, and company closure to clients from Christmas to New Year’s
• Purpose-Driven Culture: Paid volunteer time and a commitment to social equity
• Career Development: Work alongside industry leaders and access continuous learning opportunities

Ready to grow with us?

If you’re looking for a role where your voice matters, your growth is supported, and your work makes a difference—

Social Equity

Interface is committed to social equity within our walls and in our communities. We are a diverse, inclusive, and responsible firm. Interface provides equal employment opportunities (EEO) to employees and applicants regardless of race, color, religion, sex, sexual orientation, gender identity, national origin, disability, protected veteran status or any other applicable federal or state-protected classifications.We support local business and seek to partner with small and minority-owned firms on our projects. Our staff is empowered to design community service programs (e.g., clean up beaches, serve meals at shelters, tutor school-aged children, etc.) – using paid volunteer time.

Please note: H1-B visa sponsorship or transfer is not approved for this position.

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