Our team

Andrew's leadership is defined by clarity of vision, creative courage, and deep collaboration. With a passion for spaces that elevate daily life, he blends timeless design principles with future-focused thinking, championing innovation in materials, technology, and sustainability. This has resulted in numerous awards including the Sir Zelman Cowen Award for Public Architecture and the Victorian Architecture Medal which were awarded to the Monash University Woodside Building for Technology and Design in 2021.

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Known for his entrepreneurial drive, Andrew leads projects with a sharp understanding of investment and acquisition, balancing broad value with design integrity. His leadership on the complex Metro Martin Place Station and Precinct, in collaboration with Macquarie Group, is a defining example.

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Over three decades Andrew has built a portfolio of work across transport and sports infrastructure, educational and science facilities, modular housing, commercial towers, and the industrial design of urban furniture and componentry.

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His strategic insight is at the core of OCG, seeking out clients and projects that wish to make a lasting impact.

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Mark is an architect and urban strategist whose career has been shaped by a deep curiosity about how cities work and how they can work better for people. With more than two decades of international experience, he brings a thoughtful, human-centred approach to shaping the built environment, grounded in both technical expertise and lived experience.

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Originally from London, Mark’s early career exposed him to some of the world’s most complex urban conditions. That global perspective continues to inform his thinking, but it is in Australia, particularly Sydney and Brisbane, where his work has found its strongest expression. Here, his passion for place, climate, and community has evolved into a focus on creating environments that are both resilient and deeply connected to the people who use them.

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His work spans transport planning, civic and housing masterplans, industrial design, and major sports and recreation projects. Whether working at the scale of a city or the detail of a public space, Mark approaches each project as an opportunity to create something lasting, places that feel generous, purposeful, and alive.

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A defining moment in his career is the Parramatta Aquatic Centre, awarded the 2024 AIA Sulman Medal for Public Architecture. For Mark, the project represents more than recognition; it reflects a belief in the power of civic architecture to bring people together and elevate everyday experience.

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As Managing Director of the Sydney and Brisbane studios, Mark’s role extends beyond projects. He is deeply committed to building teams, mentoring emerging leaders, and shaping a culture that values integrity, curiosity, and shared ambition.

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Alongside his practice, Mark remains closely connected to education and the future of the profession. He regularly teaches and contributes to design critique at leading Australian universities, and in 2025 was appointed to the NSW State Design Review Panel, an opportunity to help guide the quality and direction of the built environment at a broader scale.

Annalisa is a multi-award-winning architecture student who believes that good design should make a meaningful impact for the greatest number of people. Her approach combines creative vision with practical, context-aware solutions, carefully balancing client needs with the surrounding environment.

Jeffrey is a registered architect with over 10 years of experience. He leverages advanced digital workflows to design people-centric architecture that is innovative, sustainable, and enduring. He has extensive experience across the full project lifecycle from inception, concept design through to delivery in complex, multidisciplinary residential, commercial, industrial and transportation projects.

Jeffrey was awarded the Master of Architecture Graduate of the Year at the University of Sydney. He actively contributes to architectural education and tutors in Advanced Construction and Structures at the University of New South Wales, as well as Computational Design at the University of Sydney.

Mathew has over 25 years of wide-ranging experience within the industry across various project scales and typologies. He has developed his skills during this time with a broad expertise ranging from project inception through to project completion, with a focus on maintaining these skill sets through continued involvement across the various project phases.

Mathew understands the importance of collaboration with various stakeholders, including clients, authorities, consultants, and contractors and actively seeks opportunities for professional development and growth within the profession, whether it’s exploring innovative construction techniques, emerging sustainable practices, or new technologies, all to the benefit of the clients, their projects, and the projects end users.

Michael has built an extensive career in Australia and internationally, working across architecture, master planning, and interior design. His practice is defined by collaboration and a commitment to design excellence, consistently delivering outcomes that balance the aspirations of clients with the needs of the wider community.

With a deep appreciation for responsible design, rigorous documentation, and the complexities of approval processes, Michael brings a grounded and disciplined approach to every project. This foundation, shaped by years of experience and influence, has been central to achieving enduring and successful outcomes.

Michael’s work reflects a timeless quality, where thoughtful design, technical precision, and community benefit come together to create projects of lasting value for all stakeholders.

Michelle is a designer with extensive experience across a range of large-scale commercial and residential projects. She integrates computational design into her practice to effectively assess and develop creative design solutions.

Alongside her practice experience, Michelle teaches Architectural Modelling and Prototyping as well as Computational Design at the University of Sydney.

Alessandro is an architecture student with a passion towards designing for societal impact and the intricate detail of the built environment. His approach to design blends creativity and curiosity, capturing moments of the extensive human experience. He is driven by personal experiences to illustrate a detailed narrative within his designs.

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Tim Dyer is an accomplished architect with over 20 years of Australian and international experience, leading the delivery of complex and large-scale projects across transport, infrastructure, commercial, hospitality and sports sectors. His expertise spans the entire project lifecycle, ranging from strategic business case development and early concept design through to detailed documentation and construction delivery.

As an Associate Director, Tim plays a pivotal role in guiding teams and clients through challenging design and delivery processes, consistently achieving outcomes that balance innovation, functionality, and long-term value.

Vincent is a Graduate of Architecture with three years of experience across residential, commercial, and transport projects. Specialising in concept design and master planning, he takes a balanced approach to architecture, combining creative engagement and sensitivity to context with attuned computational and technical skills to deliver outcomes that are both thoughtful and people-focused. Having lived and worked in Sydney, his work is informed by an appreciation for the character and memory of place.

With more than 30 years of professional experience, Wayne Henkel has established a distinguished career across Australia, the UK, China, and Southeast Asia, including Singapore, Malaysia, and Indonesia. His work spans a broad spectrum of building types and scales, from complex commercial developments to bespoke architectural projects.

Wayne’s expertise lies in seamlessly integrating design, detailing, documentation, and consultant coordination to deliver projects of clarity and precision. His ability to manage the full breadth of architectural services, from concept through to completion, ensures a consistently high standard of delivery across all sectors.

William is a strategic and creative design leader with over 15 years of international experience in the delivery of award-winning, city-shaping projects across a broad range of scales and sectors including cultural, master planning, transportation, commercial, and residential. Central to his approach is a commitment to working collaboratively and innovatively to deliver socially and environmentally conscious solutions of architectural distinction. His work is driven by the belief that architecture should place people at the forefront of the agenda - championing thoughtful, well-executed and enduring outcomes that provide broad-spectrum value for stakeholders and communities.

Having worked extensively across the UK and Australia, William is well-versed in leading high profile, demanding and complex projects. He brings particular expertise in the adaptive re-use and transformation of existing buildings, helping both private and cultural institutions in creating resilient, adaptable spaces that reveal meaningful and authentic narratives about each project’s context, stimulating the imagination and memory of its inhabitants and the broader society.

Yijia is a recent Master of Architecture graduate from the University of Sydney with experience spanning architecture, master planning, landscape, and competition projects. Bringing a fresh and innovative perspective, Yijia contributes strong design ideas and ensures effective outcomes through dedication and consistent effort.

Passionate about sustainability and the integration of local cultural heritage, Yijia is committed to creating architecture that is both environmentally responsible and deeply connected to place.