Our team

A full architectural and design service

Nigel Walter​ ArchAngel

Nigel Walter

Nigel is the founding director of Archangel, and a Specialist Conservation Architect. With 30 years’ experience of community-based architecture, he is central to the strategic direction of the practice. In 2018 he was made an RIBA Fellow in recognition of both his ’thought leadership’ and the positive social impact of his practice. 

‘I particularly love strong contemporary design in deeply historic places and remain involved in both practice and academic research; Archangel has developed to reflect that. This combination is mutually enriching, both leading to more considered design and keeping our research grounded, adding to the reach and impact of the practice.’

Nigel regularly writes, speaks and teaches on conservation. He is a member of the Association for Project Management (MAPM), a DCMS-nominated member of the Church Buildings Council, and an RIBA conservation accreditation assessor. He is also an active member of two ICOMOS International Scientific Committees: for Places of Religion and Ritual (PRERICO), and for Theory and Philosophy of Conservation and Restoration (Theophilos).

Away from the office he serves his local parish church as a Licensed Lay Minister.


  • Studied architecture at University of Cambridge, gaining a first; qualified in 1992
  • Established Archangel in 2000
  • MA in Historic Building Conservation (University of York) 2012
  • PhD (University of York) 2017
  • Published author, with two books and numerous articles, both academic and professional.


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talk to an architect Dirk ArchAngel

Dirk Visagie


A longstanding member of the Archangel team, Dirk qualified as an architect in his native South Africa and has worked in the UK since 2005; he oversees the day-to-day running of the office.

Dirk works closely with clients, community groups, contractors, developers and consultants to help Archangel deliver projects in a collaborative manner. Part of his role is to help team members develop their skills and interests, and is currently busy integrating sustainability and modern methods of construction into our processes, to suit different project types and budgets.

‘I’m always trying to develop systems and explore how technology can provide best value for clients and the practice. I believe architects should make the design and delivery process more accessible and transparent to clients and project team members alike. The good news is that the tools are beginning to match the ambition – whether BIM technology, which Archangel has implemented from the outset, meetings via online platforms, or whatever other tools develop efficient ways of working for us and our clients.’

Dirk is a member of C3 Church Cambridge. He is also a scout leader (‘dib dib dib’) and enjoys almost any outdoor pursuits, though hasn’t been skydiving for a while.


  • Trained at University of the Free State, Bloemfontein, South Africa; qualified 2007
  • Joined Archangel 2005
  • Appointed director 2013
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Apostolos Petrakis ArchAngel

Apostolos Petrakis


Apos has worked as an architect in his native Crete, where he ran his own practice, and in Germany and the UK. His professional focus is social and environmental sustainability across all types of project. He is a certified Passivhaus designer, and leads our implementation of energy efficiency and sustainability. 

‘I was particularly proud to have led the Trinity Methodist Church project because of its immensely positive social impact. The level of comitment and engagement from everyone involved – church, contractor and consultant team – was inspiring.’

Apos is also responsible for coordinating CPD and for quality management within the office. He enjoys good music, good company and good food, and makes excellent stuffed courgette flowers.


  • Trained at the Technical University of Berlin; qualified 2004
  • Joined Archangel in 2014
  • Appointed associate in 2017
  • MSc in Environmental Design (Cardiff University) 2018
  • Certified Passivhaus Designer 2020 

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Jack Boyns ArchAngel

Jack Boyns


Along with project running & technical design, Jack also acts as the office CAD guru. He has led the detailed design and site inspection on our major refurbishment of Downing Place United Reformed Church, where he has made good use of our BIM capability to discuss construction details with the contractor. 

‘I enjoy working for Archangel because we create architecture that nurtures relationships, whether the buildings are homes, churches, workplaces or places of study.’

Outside of work, Jack is a volunteer youth worker at St Andrew’s Street Baptist Church, and a mean badminton player. He also plays bass guitar, and in 2020 became father to Ezra, the most recent archangel cherub.


  • Trained at University of Nottingham & London Metropolitan University; qualified 2019
  • Joined Archangel 2012
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Alexandros Michalitsianos

Alexandros Michalitsianos

Conservation Specialist

Alex is a Chartered  Architectural Technologist (MCIAT) and Accredited Conservation Specialist, with broad UK and European experience, including the renovation of the listed, five-star Metropole Palace Hotel in Belgrade, and the Royal Worlington & Newmarket Golf Club

A lover of detail, he is involved in the quinquennial inspection of historic church buildings and the subsequent specification of repair works, and has led the detailed design on our church reordering projects at St Peter & St Paul, Bassingbourn and at All Saints, Cottenham.

‘What I love about working in this way is being able to play a part in the ‘living history’ of these amazing historic buildings, and having the chance to add another page to what is a never-ending story. In this way we become participants in ‘the tradition’.

Alex also has an interior design qualification and brings those skills to bear on many of our projects, including Dernford House and Lansdowne House. Outside of work, he enjoys sailing, skiing, traveling, cooking, and writing on tech, entertainment & travel websites.


  • Trained in Interior Design (Middlesex University) 2009
  • MSc Conservation of Historic Buildings (University of Bath) 2014
  • Joined Archangel 2014
  • CIAT Accredited Conservationist 2020
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Portrait photograph of architect David

David Ogilvie


David recently qualified as an Architect from Newcastle University. He brings to Archangel experience creating high end bespoke alterations, extensions, and new builds for family homes in an eclectic and sympathetic design language. He has frequently run projects working in Cambridgeshire’s many conservation areas and on listed buildings.

It was while living in Newcastle that his love of astrophotography took off, and you will now find David outside on most clear nights photographing distant galaxies and nebulae, regardless of how cold it gets!
David is a member of The C3 Church where he heads up the Photography Team in Cambridge and serves on both the Young Adults and Youth teams.
“I am passionate about the natural world, and finding more sustainable methods of construction, and recognise the moral responsibility that architects have to bring about positive change within the built environment for the betterment of the planet.”
  • Trained at Newcastle University (2022)
  • Joined Archangel Architects 2023
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Portraid photograph of architect Oksana

Oksana Lavreniuk-Tsyrik

Architectural Assistant

Oksana was inspired to join the architectural profession by her architect father and qualified as an architect at the Crimean Academy of Environmental Protection and Resort Construction in Ukraine in 2005.

On graduating she joined the KrymNIIproekt Research Institute where she undertook research and design work to redevelop a disused stone quarry into an entertainment park. She also developed experience in high-rise residential buildings, shopping malls, kindergartens and private homes.

“What I enjoy most is working on the design of individual residential buildings where I can work closely with clients to create homes that work for them.” 

Oksana enjoys decorative arts and in particular abstract painting. Out of work she likes to spend time with her family, travelling, hiking, cooking and playing volleyball. 


• Crimean Academy of Environmental Protection and Resort Construction (2005) 

• Joined Archangel in 2023

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