Our People. Our Values. Our Approach.

Behind every successful project is a team dedicated to delivering safe, efficient and well-considered engineering solutions. At Onyx Engineers, we combine experience, technical knowledge and clear communication to achieve the best possible outcomes for our clients.

ABOUT ONYX

The Onyx Team

At Onyx Engineers, our team is united by a shared commitment to delivering practical, reliable and high-quality engineering solutions. Combining technical expertise with a collaborative approach, we work closely with clients, architects, builders and contractors to understand each project's unique requirements and provide clear, effective engineering advice from concept through to completion.

We believe successful projects are built on strong relationships, open communication and attention to detail. By taking a proactive and solutions-focused approach, our team is able to respond to complex challenges with confidence, delivering safe, efficient and cost-effective outcomes that meet the highest professional standards.

OUR PRINCIPAL

Justin Tzannes

Principal Engineer

BEng (Sydney) MIEAust CPEng NER (Structural)
4050881 RPEQ 32334, VIC PE0015258
NSW - Class 2 (Structural) DEP0004294

Email: justin@onyxengineers.com.au
Mobile: +61 424 991 007 
LinkedIn

Onyx Engineers is led by our Principal Engineer, Justin George Tzannes.

Justin is passionate about problem-solving processes and is very analytically driven to deeply understand concepts/problems and aim to deliver the best possible outcomes and solutions.

With over 15 years of experience in the engineering industry, he is highly skilled and capable of tackling a wide spectrum of disciplines that include steel, timber, concrete, aluminium, glazing construction across many different sets of legislations and engineering requirements.

Under his belt, he has thousands of inspections from which to draw experience in these different fields and has successfully delivered small projects through to larger projects such as apartment buildings and bridges.

He regularly delivers effective solutions for his clients, and maintains strong relationships built off trust and good service.

Onyx Engineers aims to provide the construction industry with safe, sustainable, effective and innovative engineering solutions that stand the test of time.

Summary of experience

Justin has 15+ years experience in the field of Structural engineering design across many disciplines including steel, timber, concrete, aluminium, glazing structures, including modifications and critical condition/ investigation reporting of existing structures. He has acted as team leader, principal designer, and project manager for a range of clients that include government, institutional, commercial and private.

  • Cable Bridge Structure Design. Project life-cycle collaboration with architectural/consultant/client teams to co-ordinate full DA/CC/Construction Documentation of Concrete, Steel-Framed, Timber and/or Masonry Structural Design for a range of Commercial Building Structures including 12 storey apartment buildings, 3-Storey Mixed-Commercial, Fuel Stations, Quick-Service Restaurants. Luxury, Medium and High Density Residential projects including Shoring/Piling, Retaining Walls, Footings, Slabs/Beams, Columns, Walls, 3D Lateral and Dynamic Analysis. Building fit-out engineering including aluminium, glazing and material-board joinery design.

  • 1000+ onsite inspections of reinforced concrete elements including Shotcrete Walls, Capping Beams, Waffle Pod Slabs, Footings, Columns, Walls, Slabs, Piles and Structural Anchoring.

  • Assessment and reporting of Masonry, Concrete and Steel Structures, including analysis and recommendations for post-collision structures. Third-party reviews of structures with suspected structural non-compliance, reporting on the structural significance of masonry and concrete cracking, and general condition reporting of building elements including timber framing, ceilings, footings, slabs and steel structures.

  • 300+ onsite inspections, including experience as a Major Transfer Slab Inspector. Individually certified 500mm–1200mm slabs across more than 30 construction sites, with experience in post-tension modelling and concrete slab design.

  • 1100+ formwork inspections and extensive experience in formwork design and certification, including slab and beam formwork (conventional and proprietary), crane loading platforms, handrails, SWL platforms, vertical formwork (columns and walls), steel bracing and shoring, multi-storey backpropping arrangements and procedures, large-scale scaffold systems, and unique temporary works solutions for complex construction challenges.

    • Registered Professional Engineer Queensland (RPEQ No. 32334)

    • Registered Professional Engineer Victoria (PE00015258)

    • National Engineers Register (Structural) – NER No. 2040073

    • Member of Engineers Australia (MIEAust)

    • Chartered Professional Engineer (CPEng)

    • Design & Building Practitioner NSW – Class 2 Structural DEP0004294

    • Member of the Concrete Institute of Australia

    • Member of the Steel Institute of Australia

    • Member of the Post Tension Institute of Australia