Junior Mechanical Designer – Residential

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. Perform and review HVAC load calculations, duct sizing, and system sizing per ACCA Standards .

Posted 9/16/2026full-timeFairfax • Virginia • United StatesJunior💰 $50,000 per yearWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in HVAC load calculations, duct sizing, and system sizing in accordance with ACCA Standards, while effectively managing project timelines and deliverables. Proficient in utilizing Excel and SharePoint for data management and possesses strong communication skills to interface with clients and stakeholders.

Highest-signal resume keywords

HVAC Load CalculationsExcel ProficiencyAutoCAD ExperienceAttention to DetailUnderstanding of IECC Codes

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills

HVAC Load CalculationsDuct SizingSystem SizingThermodynamicsFluidsMaterial ScienceCircuitsManual J SoftwareWrightsoft-WrightdrawRESCheck

Soft Skills

Attention to DetailDeadline-OrientedTime ManagementInterpersonal SkillsVerbal CommunicationWritten Communication

Tools & Technologies

ExcelSharePointAutoCADREVITWrightsoft-WrightdrawRESCheckREMrate

Certifications & Qualifications

EIT (Engineer in Training)

Industry Keywords

ACCA StandardsResidential Mechanical DesignGreen BuildingIECC CodesState Codes

About the role

Key responsibilities & impact

Perform and review HVAC load calculations, duct sizing, and system sizing per ACCA Standards
Provide support to the analysis team
Communicate auditing areas to Management and provide options for resolution
Organize scope into major categories to outline deliverables and milestones
Determine primary timetable for deliverables
Modify critical paths based on prevailing conditions
Develop workarounds to overcome obstacles in the critical path
Integrate, review, and validate critical relationships with primary parties
Receive and understand client constraints
Manage and control all data through Excel and SharePoint
Interface with Operations, Owners, and Subcontractors to discuss work impacts and resolve problems
Participate in training and professional career development focused on residential mechanical design, green building, and certifications

Requirements

What you’ll need

BS Degree in Mechanical Engineering or relevant field is required
GPA of 3.0 or above
Relevant coursework including Thermodynamics, Fluids, HVAC, Material Science, and Circuits
Advanced Proficiency in Excel/SharePoint
Strong Attention to Detail
Deadline-Oriented
Efficient Time Management Skills
Effective Interpersonal Skills
Excellent Verbal/Written Communication Skills
Ability to read/write/comprehend technical instructions
Ability to modify and adjust to Manual J Software, AutoCAD, Wrightsoft-Wrightdraw, RESCheck, and REMrate
Understanding of current IECC and state codes for Residential Design
EIT is not required; obtaining it may qualify for a salary incentive
AutoCAD or REVIT experience during college is a plus

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