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Senior Residential Mechanical Designer

Luxus


Job Location:

Chantilly, VA - USA

Monthly Salary: Not provided by the employer
Posted: 29 September 2026 (Yesterday)
Application Deadline: 27 December 2026
Vacancies: 1 Vacancy

Job Summary

Senior Residential Mechanical Designer

Company Name: PEG LLC
Location: Fairfax VA
Project Focus: Residential HVAC Design Energy Efficiency High-Performance Homes Home Energy Ratings Green Building Construction Compliance
Work Setting: Full-Time Hybrid Remote/Office
Recruited By: Luxus

Position Overview

This is an opportunity for an experienced residential HVAC professional to take on a senior technical role focused on residential mechanical design energy efficiency code compliance and high-performance building practices with PEG LLC.

As a Senior Residential Mechanical Designer you will serve as a senior technical resource for residential HVAC design and analysis taking ownership of load calculations duct sizing equipment selection QA/QC energy modeling project coordination and technical problem-solving. You will also help improve internal processes and mentor junior and mid-level team members.

PEG has nearly three decades of experience delivering energy efficiency engineering environmental and management consulting services and has provided Home Energy Ratings for more than 300000 homes. This role provides the opportunity to contribute directly to PEGs mission of improving building energy efficiency and the quality and performance of residential construction.

The position is based in Fairfax VA with the option for a hybrid remote/office work schedule.

Core Responsibilities

  • Lead the preparation review and validation of residential HVAC load calculations duct sizing ventilation strategies and equipment sizing in accordance with ACCA standards and applicable energy codes.
  • Serve as a senior technical resource for residential mechanical design and analysis teams.
  • Perform advanced QA/QC reviews of residential mechanical designs and energy modeling deliverables.
  • Identify design compliance and workflow issues and communicate recommendations and resolution strategies to management.
  • Manage complex project scopes deliverables milestones priorities and timelines.
  • Develop technical solutions and process improvements that maintain project quality and schedule.
  • Coordinate mechanical design requirements with internal departments clients builders architects subcontractors and other project stakeholders.
  • Interpret client requirements jurisdictional constraints energy codes and project-specific design considerations.
  • Utilize residential HVAC and energy modeling platforms including Manual J software AutoCAD WrightSoft/Wrightdraw RESCheck and REM/Rate.
  • Maintain accurate project documentation calculations reports and records using Excel SharePoint and internal systems.
  • Interface with operations owners builders and subcontractors to resolve technical issues and communicate project impacts.
  • Maintain advanced knowledge of IECC requirements state energy codes and residential mechanical design standards.
  • Support the development of internal best practices templates workflows and process improvements.
  • Train and mentor junior and mid-level team members on technical procedures software code compliance and company standards.
  • Assist with onboarding and technical development initiatives for new employees.
  • Participate in continuing education certifications and professional development related to residential HVAC design energy efficiency and green building practices.

Required Qualifications

  • Bachelors Degree in Mechanical Engineering or a related field.
  • Minimum 3 years of relevant residential mechanical/HVAC design experience.
  • Advanced proficiency in AutoCAD.
  • Advanced experience with HVAC load calculations.
  • Advanced proficiency with WrightSoft or similar residential HVAC design software.
  • Strong understanding of ACCA Manual J Manual D and Manual S methodologies.
  • Strong working knowledge of IECC requirements ENERGY STAR and state residential energy codes.
  • Strong analytical and problem-solving abilities.
  • Excellent attention to detail and accuracy.
  • Ability to manage multiple projects deadlines and priorities simultaneously.
  • Strong written and verbal communication skills.
  • Ability to work independently while contributing to team development.
  • Ability to effectively collaborate with builders architects clients subcontractors and internal teams.
  • Comfort with the Fairfax VA office location and hybrid remote/office schedule.

Preferred Qualifications

  • Engineer in Training (EIT) designation.
  • Experience with green building programs and high-performance residential construction.
  • Experience with residential energy modeling and construction compliance.
  • Experience with Manual J Manual D and Manual S beyond basic application.
  • Experience mentoring or training junior and mid-level technical staff.
  • Experience developing technical standards templates workflows or process improvements.
  • Advanced proficiency in Excel and SharePoint.
  • Experience working with emerging residential HVAC design and energy efficiency technologies.

EIT Incentive: PEG offers a salary incentive for professionals who obtain their EIT designation.

Compensation & Benefits

PEG offers a comprehensive total rewards package designed to support employee growth flexibility and long-term career development.

Benefits include:

  • 20 annual paid days off including PTO birthday PTO and company-paid holidays
  • Company-sponsored medical insurance with a contribution of up to 50% of the monthly premium
  • Dental and vision insurance
  • 401(k) retirement plan with up to a 4% company match vested immediately
  • Basic and supplemental life insurance
  • Short-term and long-term disability coverage
  • Accident and pet insurance
  • Corporate-sponsored events
  • Paid professional development
  • Salary incentives through learning and certification opportunities

About PEG LLC

PEG LLC is a diverse energy efficiency engineering environmental and management consulting firm with nearly three decades of experience serving clients throughout the Eastern and Central United States.

PEG partners with many of the nations leading homebuilders to deliver construction compliance services and has established itself as a leader in Home Energy Ratings and energy-efficient residential construction. With more than 300000 homes rated PEG combines technical expertise data-driven solutions and sustainable building practices to improve energy efficiency and long-term building performance.

The company focuses on innovative solutions that support high-performance buildings sustainable development client success and better quality of life in the communities it serves.

About Luxus AEC Talent Partners

Luxus is an AEC recruiting firm connecting experienced architecture engineering and construction professionals with organizations building the future of the industry.

We partner with firms across the AEC sector to identify technical professionals whose experience leadership and career goals align with opportunities that may not be widely advertised.

Not the right fit for this role We still want to hear from you. Our network continues to expand with opportunities across architecture engineering building systems and related disciplines.

Keywords

Senior Residential Mechanical Designer Residential Mechanical Design Residential HVAC Design HVAC Engineering Mechanical Engineering Residential MEP HVAC Load Calculations Manual J Manual D Manual S ACCA WrightSoft Wrightdraw AutoCAD RESCheck REM/Rate Energy Modeling Energy Efficiency IECC ENERGY STAR Green Building High-Performance Buildings Residential Construction Home Energy Ratings QA/QC Mechanical Design HVAC Design Fairfax VA Virginia


Required Experience:

Senior IC


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