Mechanical Senior Designer

Affiliated Engineers, Inc; Washington (District of Columbia); On-site; USD 90,000 - 125,000; Full time

Job summary

Affiliated Engineers, Inc. (AEI) is seeking a Mechanical Senior Designer in our Washington, D.C. office to help our clients achieve energy-efficient building solutions and greener outcomes.

The role involves developing system designs from concept plans and basis of design, based on user input, field surveys, and code research. The ideal candidate has an Associate’s Degree in HVAC or Architectural Design and at least 7 years of HVAC design experience, with proficiency in Revit and AutoCAD and a

Qualifications

• Associates Degree in HVAC or Architectural Design or equivalent experience required.
• 7+ years of experience in HVAC design.
• Proficiency with Revit and AutoCAD required.
• Understanding of applicable design codes and specification requirements.

Responsibilities

• Establish design criteria and develop system designs from concept plans and basis of design as well as information gathered from users, project partners, field surveys and code research.
• Collaborate with project team to ensure designs meet client needs and codes.

Skills

Communication skills

Organization & time management

Technical comprehension

Task prioritization

Teamwork

Education

Associates Degree in HVAC or Architectural Design

Tools

Revit

AutoCAD

Job description

Join a Team Where Engineering Excellence Drives Opportunity

AtAffiliated Engineers, Inc. (AEI), we bring together expertise and innovation to solve the most complex challenges. Since 1978, we’ve supported mission-driven organizations in designing systems and environments that advance society and improve lives. Today, with more than 1000 professionals across 23 offices, we help shape the future of healthcare, science and technology, energy, education, and other vital sectors.

From elevating patient care in Mayo Clinic’s world‑class hospitals to enabling discovery in high‑containment laboratories for U.S. agencies and driving environmental progress with Microsoft’s renowned Thermal Energy Center, our work enriches the human experience, safeguards the environment, and pushes the boundaries of possibility.

AEI consistently earns national recognition from leading industry publications, including Building Design+Construction, Engineering News‑Record, and Consulting‑Specifying Engineer, with distinctions such as being named the #1 Laboratory Engineering Firm in the nation and receiving multiple Best of the Best Project awards, underscoring the lasting legacy of our work.

At AEI, you’ll join a collaborative community where your expertise fuels innovation, your ideas drive progress, and your work helps shape a brighter future.

As a Mechanical Senior Designerin our Washington, D.C.office, you will help us empower our clients to achieve energy‑efficient building solutions, save global environments, and create a better, greener future for all.

Here’s why we need you:

In this role, you will establish design criteria and develop system designs from concept plans and interpret information set forth in basis of design as well as information gathered from users, project partners, field surveys and code research.

Expertise of our most successful Mechanical Senior Designer:

• Associates Degree in HVAC or Architectural Design or equivalent experience required.
• 7+ years of experience in HVAC design.
• Proficiency with Revit and AutoCAD required.
• Understanding of applicable design codes and specification requirements.

Effective skills to help you flourish:

• Strong spoken and written communication skills.
• Excellent organization and time management skills.
• Quick technical comprehension and motivation focused on client outcomes.
• Able to effectively prioritize multiple tasks.
• Effective working individually and within team environments.

When you work here, you can expect:

• A flexible, collaborative environment where your well‑being matters—because your best work happens when you’re supported.
• Real opportunities to grow—through mentorship, professional development programs, and exposure to high‑impact projects across disciplines.
• To collaborate with inspiring teammates who challenge the status quo, foster innovation, and pave the way for future leaders.
• A benefits package that offers health, dental, vision, and retirement, a performance-based year-end bonus, and thoughtful perks tailored to your needs—whether that's a flexible work environment, wellness resources, or community-focused initiatives, we’ll continue to invest.

AEI is proud to be an EEO/AA Employer/Vet/Disabled.