Director Profiles

Kasia Constable
Director, Master’s in Architecture & Town Planning ARB RIBA

Co-founder of Sketch Design, Kasia leads a team of experienced architects and shares responsibility for the design strategy and management of the practice. She is fully involved in the delivery of all projects overseeing quality and production output. Kasia’s varied international experience strengthens her broad outlook and inspires her open-minded approach to problem solving.

After graduating from Poznan University of Technology, Poland, she worked at practices in London and Warsaw, where she worked with a wide range of clients including universities, further education colleges and private developers. Passionate about design, she co-created a TV mini-series promoting good residential architecture in Poland.

Heather Miles
Director, BA (Hons) 3D & Spatial Design

Co-founder of Sketch Design, Heather leads the interior design team and shares responsibility for the design strategy and management of the practice. Heather's keen design eye and meticulous attention to detail ensures excellence. She has successfully delivered projects for a range of private clients, developers and charities.

Educated at Brighton University of Architecture, Heather has a career history of creating unique interiors & award-winning buildings in the residential, retail, office and leisure sectors. Prior to establishing Sketch, she led Dyer Interiors, and earlier spent 11 years at MPS Architects as senior designer.


Francesco Sansostri
Senior Architect ARB RIBA

Francesco, joined Sketch Design in 2015 and brings immense technical experience, project management skills and in-depth knowledge of the industry gained from over 35 years of professional practice. Educated at the University of Naples, for 8 years he ran his own architectural studio, before becoming a director of a London practice after settling in the UK. He has been in charge on the contractor’s side in the delivery of projects such as the Embassy Gardens in Nine Elms.

Guillermo Lavernia
Architect ARB

Guillermo is an architect with a significant international experience working on residential, retail and commercial projects. He has great design ability and is currently involved in several key projects within the practice. Educated at the Technical University of Valencia, Guillermo spent a year at Êcole d’Architecture Paris-La Villette Paris as part of the Erasmus exchange programme. He has worked in London since 2013, and previously in Netherlands and Spain.

Arantxa Villar
Architect ARB

Arantxa joined Sketch Design in early 2015 and has since been involved in projects including refurbishment of a Grade II Listed building and interiors of a high-end private residence. Educated at a British school, she obtained a Master’s degree in Architecture from the University of Las Palmas de Gran Canaria and an MA in Interior & Retail Design from The University of Westminster. She won an international scholarship for her community related diploma project in Morocco. Prior to moving to London in 2013 she worked as an architect in Gran Canaria.

Tom Gardiner
Architectural Assistant

Tom studied architecture at Waterford Institute of Technology, where one of his successful college projects was published in Passive House Plus Magazine. After graduating in 2012 he gained professional experience working on residential and educational projects. Since joining Sketch Design in 2015 he has significantly developed technical abilities, as part of a team tackling the challenges of a complex renovation project in the Scottish Highlands. He is currently undertaking his Part 3 qualifications to become a fully qualified architect.