Technical Interior Designer - Construction

Onni Contracting (Washington), Inc.; Seattle (WA); On-site; USD 120,000 - 140,000; Full time

Job summary

Onni Contracting (Washington), Inc. seeks a Technical Interior Designer to produce construction-ready drawings and BIM models for multifamily and office interiors. You will create space plans, elevations, and 3D models using Revit, and issue IFC files for coordination with architects and engineers.

You will generate full construction documents, render photorealistic visuals, and collaborate with clients through design reviews. A strong portfolio and 6+ years of experience are essential.

Qualifications

• Bachelor's degree in interior design, architecture, or related field (or equivalent professional experience)
• 6+ years of professional interior design experience
• NCIDQ certification or progress toward it (preferred)
• Proven proficiency in Revit and BIM modeling
• Experience designing modern apartment finishes and Class A amenity spaces for multifamily/office projects

Responsibilities

• Develop space plans, layouts, elevations, sections, and 3D models for interior design projects
• Design modern apartment unit finishes and Class A amenity spaces (lobbies, fitness centers, co-working lounges, rooftop decks, clubrooms, etc.) for multifamily and office buildings
• Produce full construction document sets: floor plans, RCPs, finish plans, millwork details, and specifications
• Model and detail projects in Revit, maintaining accurate, coordinated BIM models
• Draft and edit drawings in AutoCAD as needed for existing workflows or client requirements
• Produce high-quality renderings and visualizations using rendering software to communicate design intent to clients and stakeholders
• Export and issue IFC (Industry Foundation Classes) files for construction and for interdisciplinary coordination with architects, engineers, and contractors
• Coordinate drawings with architectural, structural, MEP, and other consultant models to resolve clashes
• Select and specify finishes, fixtures, furniture, and materials (FF&E)
• Develop lighting design concepts and layouts, including fixture selection, lighting plans, and coordination with electrical engineers
• Prepare presentation materials, mood boards, and renderings for client review
• Attend client meetings, site visits, and design reviews
• Ensure drawings comply with relevant building codes and accessibility standards
• Manage drawing revisions and maintain version control through all project phases

Skills

Revit BIM modeling

AutoCAD

IFC export workflows

Rendering software (Enscape/Lumion/V‑R

SketchUp

Interiors for multifamily/office

Building codes and ADA

Lighting design

Project coordination

Portfolio of modern interiors

Education

Bachelor's degree in interior design or related field

NCIDQ certification (preferred)

Job description

Job Description

The Technical Interior Designer is responsible for producing drawings, not just directing others. This role is fluent in industry-standard design and BIM software, skilled in producing high-quality renderings, and comfortable issuing coordinated, construction-ready drawing sets, including IFC files issued for construction. The Technical Interior Designer is able to design modern, market-ready interiors from unit finishes to Class A amenity spaces for multifamily and office projects.

What You Will Do

• Develop space plans, layouts, elevations, sections, and 3D models for interior design projects
• Design modern apartment unit finishes and Class A amenity spaces (lobbies, fitness centers, co-working lounges, rooftop decks, clubrooms, etc.) for multifamily and office buildings
• Produce full construction document sets: floor plans, RCPs, finish plans, millwork details, and specifications
• Model and detail projects in Revit, maintaining accurate, coordinated BIM models
• Draft and edit drawings in AutoCAD as needed for existing workflows or client requirements
• Produce high-quality renderings and visualizations using rendering software to communicate design intent to clients and stakeholders
• Export and issue IFC (Industry Foundation Classes) files for construction and for interdisciplinary coordination with architects, engineers, and contractors
• Coordinate drawings with architectural, structural, MEP, and other consultant models to resolve clashes
• Select and specify finishes, fixtures, furniture, and materials (FF&E)
• Develop lighting design concepts and layouts, including fixture selection, lighting plans, and coordination with electrical engineers
• Prepare presentation materials, mood boards, and renderings for client review
• Attend client meetings, site visits, and design reviews
• Ensure drawings comply with relevant building codes and accessibility standards
• Manage drawing revisions and maintain version control through all project phases

What You Bring

• Proven proficiency in Revit (BIM modeling, families, sheet sets, documentation)
• Strong working knowledge of AutoCAD
• Experience producing and exporting IFC files issued for construction and BIM coordination workflows
• Proficiency with rendering software (e.g., Enscape, Lumion, V-Ray, or similar) to produce photorealistic renderings for client presentations
• Familiarity with at least one additional interior design/visualization tool (e.g., SketchUp, 3ds Max)
• Demonstrated experience designing modern apartment finishes and Class A amenity spaces for multifamily and/or office projects
• Understanding of construction documentation standards and detailing
• Working knowledge of building codes, ADA/accessibility requirements, and material/finish specifications
• Experience with lighting design, including layouts, fixture specification, and light plans
• Bachelor's degree in interior design, architecture, or related field (or equivalent professional experience)
• 6+ years of professional interior design experience
• NCIDQ certification or progress toward it (preferred, adjust as needed)
• Strong portfolio demonstrating both design sensibility and technical drawing quality

Salary Range

$120,000-$140,000

About The Company

Onni
For over half a century, Onni has been building communities for people to live, work, and play. Our success reflects our commitment to our employees and partners, and our dedication to quality construction, innovation, sustainability, and customer satisfaction. Our expertise expands across North America, with offices in Vancouver, Toronto, Los Angeles, Seattle, Phoenix, and Chicago.

AI Use

This role may involve the use of artificial intelligence (AI) tools to support research, analysis, content development, design, reporting, or operational efficiency. Employees are expected to use AI responsibly and in compliance with company policies, data privacy requirements, confidentiality obligations, and applicable laws. All AI-generated or AI-assisted outputs must be reviewed for accuracy, quality, and appropriateness before use. Employees are also expected to disclose when AI tools have been used in the creation of work and must not present AI-generated content as solely their own original work.