About PTX

We are David Gibson and Melanie Hoessle, the co-founders of PTX Architects. We first met in 2001 while working in architectural practices in Melbourne, where we bonded together thanks to our common sensibility and passion for design. In the two decades since, we have lived, travelled and worked together throughout Australia and Europe.

Boasting over 40 years of experience between us, we have developed a team with a diverse range of expertise to create award winning and site-responsive residential and public architecture.

We are passionate about architecture’s role in developing deeper connections between built landscapes, the natural environment and the wider community.

The new visitor’s centre at Strawberry Hill/Barmup in Albany, an architecture project by PTX Architects

We founded PTX Architects in 2006 and relocated two years later to Denmark, on WA’s picturesque south coast. With deep roots in the local community, we have built our philosophy on a reverence for place, and the importance of finding harmonies between our clients’ needs and the landscape they live and work in.

We specialise in creating bespoke residential and public architecture that reflects and responds to the landscape around it, and our clients include individuals and families, local and state governments and community organisations.


We are grateful for the recognition that our projects have received, both from architecture and construction awards programs. We’re especially grateful to the builders and construction contractors - and all of the collaborators and suppliers we’ve formed strong relationships with over the years - who have helped us to realise our clients’ vision and to produce buildings worthy of such accolades.

Melanie Hoessle sitting at the beach in Denmark WA

Melanie Hoessle

Design Director

B.Sci.Eng (Arch), Dipl.-Ing.(FH)

Melanie was born in Munich and graduated from the University of Applied Sciences Würzburg-Schweinfurt in 2004 with an Engineering degree, specialising in Architecture.

Melanie has worked for award-winning architectural practices across Australia, including Wood Marsh in Melbourne and Taylor Robinson in Perth, taking part in such projects as the Australian Centre of Contemporary Art in Melbourne and the Scotch College Design and Technology building in Perth.

With a strong focus on environmentally sustainable design, Melanie is adept at responding to a project’s brief with clarity and vision, balancing each project’s looks and performance with the practicalities of construction.

As PTX's Design Director, Melanie also manages the practice and is responsible for coordinating the client deliverables - design and documentation - for each project. She also ensures that all of the architectural intent - which is detailed in the drawings - is delivered by the builder on-site during the construction phase.


David Gibson

David Gibson, Architect, standing on a rock in Denmark, WA

Principal Architect

B.Env.Des, B.Arch (hons), RAIA, ABWA 2608

David was born in Perth and graduated from the University of Western Australia with honours in Architecture in 2000. David is currently a WA chapter councillor at the Australian Institute of Architects and chairs the WA regional taskforce.

He previously worked for architectural practices in Perth and Melbourne including the award-winning firms Bollig Design Group and Woods Bagot. Before establishing PTX Architects, David spent three years in the UK working on high-profile projects for renowned international practices Foster + Partners and Rogers Stirk Harbour + Partners.

David is adept at conceptualising and conveying a singular design vision, and he uses 3D modelling and visualisation tools to communicate the look, feel and functionality of each project. These digital tools help our clients to understand all of the intricacies of the proposed project during the design phases, and help to refine the design so that it meets their needs and aspirations.

As PTX Architects’ chief project manager, David coordinates all of the specialist consultants that may have input into your project - these include engineers, quantity surveyors, sustainability and accessibility experts, landscape consultants etc. He also manages the approvals processes to obtain the necessary permits, and oversees project procurement - the appointment of your preferred construction contractor - before monitoring the construction and handover, on behalf of our clients.