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Mícheál de Siún

Mícheál has particular expertise in the design of residential & commercial projects, having delivered both large scale social housing, and high-value  residential developments. He has also specialist experience in realising Healthcare projects both in acute care, and with specific programmes such as mental health facilities and dementia care.


Mícheál has worked extensively in public procurement and, since their introduction, with the Public Works Forms of Contract, including acting as ER and as lead consultant in various conciliation and mediation procedures. He is adept at working within Public Procurement and regulatory frameworks.


Mícheál has strong design skills focused always to practical, elegant solutions to client needs and is an able communicator, presenting designs & ideas to various audiences, user groups and clients in a clear, accessible manner.



Ross joined desiun architects in 2017 becoming associate in 2023. Ross is passionate about designing sustainably and is an RIAI accredited Grade III Conservation Architect with experience working with protected structures and within conservation areas.

He is also highly proficient in BIM, delivering several projects in the UK and Ireland at BIM Level 2.
Ross returned from the UK in 2017 where he gained extensive experience in the design and delivery of award-winning projects in Higher Education, Retail, Residential, Healthcare, Civic and Leisure sectors.

Since joining desiun architects, Ross has delivered a diverse range of buildings from social housing, adaptive re-use, mixed-use office and retail to high-end residential projects. His work has been recognised with awards and accolades from institutes such as the RIAI, RIBA, and the Civic Trust Awards.

Ross Melbourne



Florian Leavy

Florian has experience in a broad range of project types, from high-end residential, boutique fit-out, to large-scale complex public contracts. A graduate of the Mackintosh School of Architecture in Glasgow, Florian has practiced with a number of Dublin's foremost design led firms, including award-winning work with De Blacam and Meagher, Denis Byrne Architects, ABK and DTA Architects.

Florian has also gathered extensive experience in public procurement during her time at the Office of Public Works (OPW) including work on the Protected Structures such as the Teagasc School of Horticulture in the Botanic Gardens. Her work on the revitalisation of a rural Garda Station was highly commended and her time at the OPW saw Florian awarded the Royal Institute of the Architects of Ireland (RIAI) Gold Medal for professional practice.

Florian enjoys engaging with clients, presenting clear exciting ideas that have relevance to a client's ambition. With an approachable attitude and keen organisation, Florian brings a coherent vision of what can be achieved on any project.

CLIENTS Desiun Architects pride themselves on client service, and development of excellent client relationships by engaging with, and understanding, our clients' requirements and ambitions. Through delivery of outstanding design, procurement advice and knowledgeable feasibility studies we have established a list of exceptional clients in the Public and Private Sectors with whom we have worked and are working;


Jason Hobson-Shaw

Regional Director - Aecom

Aecom has worked successfully with desiun Architects on a number of consulting projects. We found them to be professional and highly knowledgeable in statutory and best practice guidelines in the design of healthcare facilities. They integrated seamlessly with the design team and their input was integral to the smooth delivery of the project. We would have no hesitation in recommending desiun Architects for architectural consultancy services

Prof. Mary McCarron

Dean of the Faculty of Health Sciences - Trinity College Dublin

Mícheál de Siún was project architect on a ground-breaking dementia care building project where principles of person centred care and a strengths based approach underpinned all aspects of the design. Willow View, and Meadow View Specialist Dementia Homes have been extremely well received in the dementia care arena by staff, academic peers and by the residents now living here. The homes won ‘Specialist Care Centre of the Year’ and ‘Building project of the year’ in the Irish Healthcare Centre Awards 2014 and are the subject of an academic publication: Achieving Quality Environments for Person Centred Dementia Care. Mícheál’s input was extremely valuable ensuring the seamless integration of the highest building and energy efficiency standards while proving adept at engaging with the requirements of the client, the staff, and the service users, and resolving a building form and spaces that reflected the cutting-edge ambition behind the project. I would have no hesitation in recommending Mícheál as an architect to any prospective client.

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