Senior Residential Mechanical Designer

PEG

Senior Residential Mechanical Designer leading HVAC load calculations, duct sizing, QA/QC, and code-compliant designs. PEG delivers energy-efficiency and construction compliance services for sustainable residential buildings.

Posted 8/7/2026full-timeFairfax • Virginia • 🇺🇸 United StatesSenior💰 $68,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates advanced proficiency in HVAC load calculations, AutoCAD, and residential mechanical design, while effectively managing project timelines and deliverables. Possesses strong analytical skills and the ability to communicate technical solutions and compliance requirements to diverse stakeholders.

Highest-signal resume keywords

HVAC Load CalculationsAutoCAD ProficiencyWrightSoft Software ExpertiseACCA Manual J, D, S MethodologiesIECC Compliance Knowledge

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

HVAC Load CalculationsAutoCAD ProficiencyWrightSoft Software ExpertiseExcel ProficiencySharePoint ProficiencyEnergy ModelingMechanical Design StandardsProject ManagementTechnical DocumentationQuality Assurance/Quality Control

Soft Skills

Attention to DetailTime ManagementOrganizational SkillsInterpersonal SkillsAnalytical Problem-Solving

Tools & Technologies

Manual J SoftwareWrightsoft/WrightdrawRESCheckREM/RateExcelSharePoint

Certifications & Qualifications

EIT (Encouraged)

Industry Keywords

Residential Mechanical DesignEnergy CodesGreen Building PracticesHigh-Performance ConstructionACCA Standards

About the role

Key responsibilities & impact

Lead the preparation, review, and validation of 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 the analysis and design teams
Perform advanced QA/QC reviews of residential mechanical designs and energy modeling deliverables
Identify design, compliance, or workflow issues and communicate recommendations and resolution options to management
Manage complex project scopes, deliverables, milestones, and priorities
Establish and adjust project timelines based on project demands and changing conditions
Develop technical solutions and process workarounds to maintain project progress and quality standards
Coordinate and validate design relationships with internal departments, clients, builders, architects, and other stakeholders
Interpret client requirements, jurisdictional constraints, and project-specific design considerations
Use and adapt to Manual J Software, AutoCAD, Wrightsoft/Wrightdraw, RESCheck, REM/Rate, and emerging technologies
Maintain project documentation, calculations, and reporting through Excel, SharePoint, and internal systems
Interface with Operations, Owners, Builders, and Subcontractors to resolve technical issues and communicate project impacts
Maintain knowledge of IECC requirements, state energy codes, and residential mechanical design standards
Support internal best practices, templates, and process improvements
Train and mentor junior and mid-level team members
Assist with onboarding and technical development initiatives
Participate in continuing education, certifications, and professional development related to residential HVAC design and green building practices

Requirements

What you’ll need

B.S. Degree in Mechanical Engineering or related field is required
Minimum 3+ years of relevant experience in Residential Mechanical (HVAC) Design required
Advanced proficiency in AutoCAD required
Advanced proficiency in HVAC load calculations required
Advanced proficiency using WrightSoft or similar residential HVAC design software required
Advanced understanding of ACCA Manual J, Manual D, and Manual S methodologies
Strong working knowledge of IECC, ENERGY STAR®, and state residential energy code requirements
Experience working with green building programs and high-performance residential construction preferred
EIT is strongly encouraged, but not required
Advanced proficiency in Excel and SharePoint
Strong attention to detail and accuracy
Deadline-oriented with ability to manage multiple projects simultaneously
Efficient time management and organizational skills
Effective interpersonal and collaboration skills
Excellent verbal and written communication skills
Ability to read, write, and comprehend technical instructions and documentation
Strong analytical and problem-solving abilities
Ability to work independently with minimal oversight while supporting team development
Must be able to work in a hybrid remote/office schedule based in Fairfax, VA
New hires must complete identity and employment eligibility verification through E-Verify

Benefits

Comp & perks

20 Annual Paid Days Off (12 Days of PTO, Birthday PTO, & 7 Company Paid Holidays)
Company Sponsored Medical Insurance that includes a contribution of up to 50% off the monthly premium
Dental & Vision Insurance
401(k) Retirement Plan with up to a 4% company match vested immediately
Basic Life & Supplemental Life
Short-Term & Long-Term Disability
Accident & Pet Insurance
Corporate Sponsored Events
Paid Professional Development & Salary Incentives through Learning/Certification Opportunities
EIT salary incentive
Equal Employment Opportunity Employer
E-Verify to confirm the identity and employment eligibility of all new hires