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We strive to create a studio environment that encourages dialogue and critical input from every team member.
Our collective strength is our approachability and desire to meet common goals.

Tonia Tkachenko
She/herSenior Associate
BSc, MArch, ARB
Tonia was made a dRMM Associate in 2020 after joining the studio in 2014. Aside from day-to-day project running, team management and overseeing of deliverables, Tonia is instrumental in the progression of dRMM’s internal communication and knowledge building.
Working across a number of key residential and commercial projects, Tonia has gained valuable experience on both retrofit and new-build schemes. Her work as project lead on dRMM’s North West Cambridge Hotel has shaped the studio’s lateral approach to hospitality design, championing flexibility as a driver for creating dynamic, enduring accommodation and leisure spaces. Tonia oversees the project’s daily operations and plays a crucial role in its stakeholder engagement. Her work on the hotel’s design has ranged from concept development to value engineering, working to reconcile technical viability with user and client requirements.
Tonia’s work on relationship management extends to her internal role within dRMM, where she works to strengthen communication between the design and leadership teams. She heads forum discussions and helps steer regular Project Quality Reviews. Collectively, these tasks feed her interest in knowledge transfer from projects across to wider studio practice, ensuring constant improvement in performance and efficiency.
Tonia’s extensive project work – including the office project at 51-54 Fenchurch Street; the Old Fire Station refurbishment; the residential tower, Brill Place; and mixed-use projects based in Moscow – contributes to dRMM’s wider efforts in redefining conventional industry typologies. She is interested in driving the growth of the studio’s work sectors, examining where each of those sectors might intersect and their potential for greater international reach.
Before joining dRMM, Tonia worked at Adjaye Associates in New York. She gained her Masters in Architecture from the Bartlett, UCL, and her Part III at Westminster University.
People

Alex de Rijke
Director
Philip Marsh
Director
Sadie Morgan
She/herDirector

Jonas Lencer
He/himDirector

Judith Stichtenoth
She/herDirector

Saskia Lencer
She/herDirector

Tamsin Pearce
She/herFinance Director

Steven Wallis
He/himAssociate Director

Alexis Hewitson
She/herExecutive Assistant to Sadie Morgan

Andy Matthews
Project Architect
Auzar Tehrani
She/herSenior Architectural Designer

Benedetta Montaguti
She/herArchitect

Catherine Clarke
She/herAssociate, Studio Manager

Ceren Mihlar
She/herArchitectural Designer

Chris Bennett
He/himArch Assistant

Chris Cornelissen
He/himSenior Architect

David Byrne
He/himArch Assistant

Denice Mann-Toyinbo
She/herArchitect

Eva Neumann
She/HerArchitect

Finbar Charleson
He/himArchitect

Fin Orme
He/himArch Assistant

Findlay McFarlane
He/himArchitect

Helen Buchholz
She/herArchitectural Designer

Joe Morris
Senior Arch Assistant
Kat Scott
She/herAssociate, Regenerative Design Manager

Lily Teeling
She/herStudio Assistant

Lorenz Krauth
Architekt
Mark Laverty
He/himArch Assistant

Mathilde Schaal
She/herArch Assistant

Michael Baldwin
He/himSenior Arch Assistant

Myah Phelan
They/themArch Assistant

Nazli Usta
She/herSenior Associate

Olivia Chan
She/herArch Assistant

Paris Gazzola
She/herArch Assistant

Regina Kertapati
She/herAssociate

Sam Skogstad
He/himSenior Arch Assistant

Tara Ryan
She/herBusiness Development

Thomas Smith
He/himArchitectural Assistant

Tonia Tkachenko
She/herSenior Associate

Victoria Hale
She/herSenior Associate

Will Howard
He/himSenior Associate

William Marshall
He/himSenior Architectural Designer