Kastell is seeking an experienced Interior Designer / Showroom Sales Assistant to join our design team at our Castle Hill showroom. As a family-run business with over 40 years of experience in bespoke kitchen design and custom joinery, we specialise in creating high-end interiors for discerning Sydney homeowners, architects, builders and interior designers. This is a client-facing role combining interior design, showroom consultation and sales. You will welcome clients into our showroom, understand their vision and requirements, and guide them through the selection of premium materials, finishes, cabinetry and joinery solutions. Working alongside our experienced design team, you will help translate ideas into considered, functional and beautifully resolved spaces. The role offers the prospect to work across a diverse range of high-end residential projects, from luxury kitchen renovations through to full-home joinery and indoor-outdoor living spaces. You will become an integral part of the client journey, building strong relationships and providing a personalised experience from the initial showroom visit through to design development.
Key responsibilities
Lead clients through the complete design journey, from initial showroom consultation through to final installation
Create bespoke kitchen and joinery designs that balance aesthetics, functionality, lifestyle and architectural detail
Present and sell design solutions with confidence, guiding clients through premium materials, finishes, hardware and appliances
Develop detailed drawings and documentation for client approval and in-house production
Own the quoting and sales process, from preparing accurate project pricing through to securing the project
Collaborate directly with our in-house manufacturing team,



ensuring every design is technically resolved and achievable
Conduct site measures and final checks to ensure projects are accurately prepared for production
Build strong relationships with homeowners and industry professionals, including architects, builders and interior designers
Manage client communication throughout the project, ensuring a seamless experience from first enquiry to handover
Stay across current interior design trends, materials and finishes, bringing fresh ideas and considered solutions to each project
What we require
Experienced designer who can confidently manage clients and projects independently
3+ years' experience in kitchen design, joinery, cabinetry or residential interior design
Proven experience designing bespoke kitchens and/or custom joinery, ideally within a high-end residential environment
Strong understanding of cabinetry construction, materials, finishes, hardware and detailing
Confident producing and interpreting detailed cabinetry drawings, plans, elevations and 3D designs
Able to take a project from initial client brief through to design, quoting, approval and production
Strong understanding of spatial planning, functionality and design principles, with a highly considered eye for detail
Confident working independently and managing multiple projects and client deadlines
Previous experience in a client-facing design or sales role, with the ability to build trust and confidently guide clients through decisions
About Kastell
Kastell Kitchens is a family-run business with over 40 years of experience in bespoke kitchen design and custom joinery, specialising in creating high-end interiors for discerning Sydney homeowners, architects, builders and interior designers.
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📌 Mid-Senior Interior Designer (New South Wales)
🏢 Kastell Kitchens
📍 New South Wales