Matt Cotton 
MSc BEng CEng MIMechE

CIBSE Low Carbon Consultant
ESOS Lead assessor


Matt is a chartered engineer with an in-depth knowledge of building physics, sustainable design and energy systems. Matt started his career in product design, helping to develop cutting edge, innovative appliances for dyson. His engineering background combined with a passion for sustainable buildings provided a good stepping stone into main stream consultancy including senior positions at Faber Maunsell, AECOM and Hurleypalmerflatt. Until the formation of Twin and Earth, Matt was Technical Director at the National Energy Foundation. Matt is an accredited CIBSE Low Carbon Consultant, ESOS Lead Assessor and a Fellow of the Centre of Refurbishment Excellence (CoRE).

+44 (0)7798 803678                 

Alicia Costas Freire 



Alicia is a chartered engineer with a degree in Mining Engineering, a Masters in Energy and a passion for problem solving. With a very practical and honest approach to sustainability, Alicia has an outstanding track record supporting large complex building developments nationally and internationally. Alicia has worked at Ramboll UK and PRP environmental and, until the formation of Twin and Earth, was head of the Energy and Sustainability Development team at Hurleypalmerflatt. Alicia is a member of the Building Council for Offices (BCO) Technical Affairs and NextGen Committees and has been a guest lecturer at UCL.

+44 (0)7557 791216