Fieldfare Modelling


Mark Ringrose  (Owner, Director)
Frankfurt am Main, Germany
+49 (0)172 676 3054

Mark is a recognised expert in financial modelling. He has more than 25 years experience helping clients realise infrastructure projects and is a recognised expert in financial modelling delivering for clients across Europe. He has a focus on renewables and transportation projects and has directly supported many blue-chip clients with financial modelling services including tender and project management, model build, model review and modelling training.

Mark started his career in project risk management, developing risk management plans and undertaking project risk analysis and Monte Carlo modelling on projects in naval and construction services.

Between 2000 and 2014 Mark worked at KPMG Corporate Finance focussing on PPP projects developing bid-winning models for private sector clients while at the same time supporting public sector clients in bid appraisal and negotiation.  Mark’s M&A and corporate finance experience was developed further after a move to KPMG Germany in 2006 working on renewable energy and transportation projects where he oversaw the development of the models required to evaluate infrastructure related transactions.

Mark is a dual German and UK citizen and speaks fluent English and German.

Guy Ainsley (Associate)
London, United Kingdom
+44 (0)7793 848142

Dr Guy Ainsley runs his own advisory practice based in London, UK. ffdl provides business support services and has worked with clients on diverse projects with a focus on capacity and skills development.

Guy is an experienced non-executive director having co-founded and acted as NED (2005-2018) of an engineering business based in Los Angeles, CA. Supplying world-class motorsport components from a growing factory, Radflo Suspension Technology exports around half its production to markets around the globe. In recognition of this, Radflo was recently awarded the US Government’s Export Achievement Award.

Committed to life-long professional development Guy is a visiting fellow at Loughborough University’s School of Business and Economics.

Sebastian Szameitat (Associate)
+352 621 549 983

Sebastian is a passionate expert in financial modelling. He has more than 20 years of experience in the financial sector, over 15 years of realising infrastructure projects. His roles included investment management, analysis and modelling as well as risk management, so that he looks at every project from several angles. He has a focus on real assets, such as renewables, real estate, shipping, data centres etc. and he was involved in countless transactions providing financial modelling services including tender and project management, model build, model review and modelling training.

Until 2022 Sebastian has worked 15 years for two internationally operating investment companies and alternative investment fund managers (“AIFMs”) where he developed his M&A and corporate finance experience and was responsible for the centralised knowledge management, the development and management of standards, technical reviews and trainings for financial modelling. 

Sebastian and his family live in Luxembourg since 2015 and he is fluent in German and English.  

Thomas van de Sande (Associate)
+31 (0) 6 41 7979 07

Thomas van de Sande has 10 years of experience in modelling and presenting complex data to senior management. He has led the CAPEX Investment team (12 persons) of the Netherlands’ largest utility company, Eneco. His team was responsible for all renewable project investments; ranging from large offshore wind, solar, power generation and district heating. Thomas started his career as a logistics and supply chain consultant and therefore has quick understanding of complex technological value chains, while also understanding the financial challenges. 

Since 2021, Thomas is an independent consultant focussing on sustainable energy projects. He left Eneco in October 2023 and is now fully focussing on sustainable energy projects and bio-based buildings. He lives in Rotterdam and is fluent in Dutch and English.