Foto: K. Funch

OS in an Copenhagen-based office founded by Olmo Ahlmann and Stine Christiansen

We are a small architectural firm specialized in large-scale urban plans and view architecture and landscape as co-dependent. Sustainability is key to our practice. Both in the strategic and structural approach and in the beauty and viability of the detail.

Stine have worked on sport, culture and housing projects.

Stine is also a DGNB consultant in urban planning and draws on extensive experience in strategic planning, urban design and landscape architecture in Denmark, Norway and Germany.

She has a particular focus on the link between the grown and the built and specializes in rainwater integration

Olmo has vast experience as lead architect on school, culture and housing projects. Our passion for developing new, sustainable  building systems, draws on Olmo’s experience with both small and large scale wood based architecture projects.  

Olmo Ahlmann

2016 / Building economics, MDB
2005 / Graduation, The Royal Danish Academy of Arts and Architecture
2003 / Student at Mackintosh, Glasgow School of Art

2021 / Founding Partner OS Architects
2005 -2021 employed at Vandkunsten architects
2005/ employed at Copenhagen Municipality, Plan and Architeture
2004 / employed at Plot architects

Stine Christiansen

2020 / DGNB konsultant
2018 / Climate adaption solutions educations. Teknological Institute, DK
2008 /Graduation, The Royal Danish Academy of Arts and Architecture


2021 / Teaching at The Royal Danish Academy of Arts and Architecture 

2021 / Founding partner OS
2010 -2021 employed at Vandkunsten architects
2005 –09 / Founding partner Spektrum architects, Denmark
200/ Intern, Shigeru Ban Architects, Tokyo, Japan
2005 / Student. SLA, Kbh.

2004/ Intern, Peter Eisenman architects, New York

2000/ Art studies- Arts students, League New York