Warren and Mahoney welcomes new senior leadership

April 11, 2022: News, People

Warren and Mahoney has boosted its senior leadership team with the promotions of six Principals and six Associate Principals across the practice.


Sarah Hewlett-Diprose, David Mahon, Vajini Pannila and Peta Nichols are stepping into Principal roles in the Auckland team, while the Christchurch studio will see Joseph Hampton and Fiona Short promoted to Principal.

In addition, Edwin Ipsen, Paul Morrison, Divya Purushotham, Peter Westbrook and Dominic Plume have been promoted to Associate Principals in the Auckland studio, as has Jonathan Goss in Queenstown.

Managing Director, John Coop says depth and substance in the design practice’s leadership is vital as the practice continues to expand and diversify its team and expertise across the Pacific Rim.

“This diverse and talented group of leaders have collectively demonstrated design and technical excellence, leading their project teams to deliver exceptional service to our clients, our projects and our communities.

“We congratulate these individuals and thank them for the significant contribution they are making to the practice.”


Sarah Hewlett Diprose, Auckland

Sarah is an education sector specialist committed to building trusted relationships with clients to create quality architecture. Sarah has led award-winning education projects, and is currently Chair of Learning Environments Australasia (LEA) NZ Chapter - a community of over 800 professionals sharing best practice on the design, building and use of innovative learning environments. Sarah has built a strong reputation across Warren and Mahoney for her commitment to excellence, her clients and her teams.

David Mahon, Auckland

With over 20 years' architectural experience, David has established a track record as an innovative and highly skilled senior architect, with the ability to manage varied projects from inception to completion. Most recently, David has overseen the delivery of complex buildings including the New Dunedin Hospital and was project architect for the retail podium in the new Commercial Bay development.

Vajini Pannila, Auckland

Vajini returned to Warren and Mahoney's Auckland studio last year following 14 years in the United Kingdom, most recently working for Rogers Stirk Harbour + Partners where she was, amongst other projects, a lead architect for a major mixed-use commercial development in central Bogota. Vajini brings excellent design, communication and management skills to her role, demonstrating a strong strategic and conceptual approach in early design stages and technical rigour in detail design stages.

Peta Nichols, Auckland

Peta also joined the Auckland studio last year, having recently returned from the United Kingdom. As an Associate Director of London-based architectural practice Buckley Gray Yeoman, Peta led project teams to deliver high quality projects across the office, multi-residential and hotel sectors. Peta has proven aptitude for leadership within our practice and across project teams, with strong design, communication, interpersonal, and decision-making skills.

Joseph Hampton, Christchurch

Joseph joined Warren and Mahoney in 2006 and has worked on a projects in a range of sectors, including health, tertiary and civic and community. Joseph’s commitment to quality, his passion for our work and his strong mentoring and development of those he works with has meant outstanding delivery of projects for our clients. Further, Joseph has represented the Canterbury region on the Board of the NZ Institute of Architects, giving back to the profession.

Fiona Short, Group

Fiona joined Warren and Mahoney’s Christchurch studio as an architectural graduate and has since become a leader in sustainable design thinking at Warren and Mahoney. Her recent project involvement has ranged from masterplanning to bespoke residential designs with an emphasis on feasibility and concept design development. She brings a pragmatic approach to her work and helps clients and our project teams drive aspirational sustainable outcomes.

Warren and Mahoney welcomes new senior leadership
Associate Principals

Divya Purushotham, Auckland

For several years, Divya has been a core part of the project team charged with delivering the Wynyard Quarter Innovation Precinct for Precinct Properties, establishing and maintaining a positive and meaningful relationship with our client, contractors and consultants. Divya communicates with clarity, establishes clear expectations and works in a collaborative way, bringing everyone she works with into the conversation. Further, her commitment to our projects and teams, along with her design talent, results in the delivery of outstanding outcomes for our clients.

Edwin Ipsen, Auckland

A technical leader and expert within the practice, Edwin is regularly sought out by many across the practice to provide guidance and advice which he willingly provides. Edwin's work is of the highest quality and clarity, and he fosters high performance from those who work with him. Further, his ability to communicate design solutions, both visually and in writing, is exemplary.

Paul Morrison, Auckland

Paul is a highly experienced technical leader within Warren and Mahoney, engaging, actively leading and mentoring people across the practice. From a project perspective, Paul has added significant value and expertise on projects. His humble, precise, and patient manner enables him to connect easily with all who have the privilege of working with him – both internally and externally. A natural collaborator, Paul seeks out, values and is respectful of others' views and is highly respected in turn.

Dominic Plume, Auckland

An agile and highly skilled project leader, Dominic has successfully led a variety of project types and scales with ease. He is a positive, supportive leader and has been willing and able to assist across a number of projects, including projects that have the potential to be particularly challenging. Dominic is highly respected by his clients for his expertise, professionalism and willingness to go the extra mile to get the job done. Further, as a member of the Auckland Studio resourcing team, Dominic contributes strongly to inter-studio collaboration.

Jonathan Goss, Queenstown

Jonathan (Jono) joined the practice in 2018. He plays a pivotal role co-leading the Experience sector, with a particular expertise in hospitality, meaning he has worked on projects across the practice. A very strong, innovative and considered designer, Jono brings people together within the studio and across the wider Warren and Mahoney network to deliver quality outcomes.

Peter Westbrook, Group

Peter has recently been appointed Technical Lead, with a remit to focus on our technical outcomes across all of Warren and Mahoney. Peter demonstrates deep technical expertise, a naturally collaborative approach and strong leadership skills. He has contributed greatly to our work, particularly in relation to the documentation of the Commercial Bay project – one of the largest and most complex projects undertaken by the practice. Peter is also passionate about growing the skills and capabilities of others and supporting teams to be their best.