Our Team

Our team comprises highly qualified professionals with backgrounds in climate and environmental science, economics, finance, data analytics, engineering, policy analysis, and international development.


Emilie Mazzacurati, Founder and Chief Executive Officer

Contact | (415) 930-9090, ext: 1001
EducationMaster of Political Science, Institut d’Etudes Politiques de Paris; Master of Public Policy, The Goldman School of Public Policy, University of California, Berkeley

As a pioneer of the incorporation of climate science into decision-making in the private and public sectors, Emilie founded Four Twenty Seven in 2012 to help businesses and communities understand the risks from climate change and develop effective resilience strategies.

An expert in climate adaptation and resilience, she is a frequent speaker at international events on climate risks and opportunities, has published extensively on climate policy, and teaches at the University of California, Davis on Business & Climate Change. She served as a member of California’s Technical Advisory Group for the implementation of Governor Brown’s Executive Order on climate change (EO B-30-15) and was Head of Carbon Analysis at Thomson Reuters Point Carbon. Emilie received the Visionary Award from the City of Berkeley, CA in 2016 and was a finalist for the Cartier Women’s Global Initiative for women entrepreneurs in 2014.

Frank Freitas, Chief Development Officer

Contact | (415) 930-9090, ext: 1006
EducationMaster in Asian Studies, University of California, Berkeley; Bachelor of Science in Operations Research & Accounting, University of California, Berkeley

As Chief Development Officer, Frank draws on his nearly 30 years of experience in the financial services industry to guide the product development agenda for Four Twenty Seven’s diverse client base.

Having spent his career developing award-winning solutions for global institutional investors, Frank is a seasoned veteran of product management and strategic planning.  He founded Pluribus Labs, a research and analytics firm devoted to the translation of unstructured data into investable signals. Frank has also served as Chief Operating Officer and Head of Product Strategy at Instinet and in the product management organization at MSCI (then Barra).

Colin Shaw, Chief Operating Officer

Contact | (415) 930-9090, ext: 1004
EducationMaster of Development Practice, University of California, Berkeley; Certificate of “Engineering and Business for Sustainability,” University of California, Berkeley; Bachelor of Science in Mathematics, University of Massachusetts, Amherst; Enrolled Actuary with the Internal Revenue Service

As Four Twenty Seven’s Chief Operating Officer, Colin oversees operations, finances, and leverages his dual background in business and climate change to coordinate the development of Four Twenty Seven’s climate risk intelligence platform

Prior to Four Twenty Seven, Colin spent eight years in Transaction Services at PricewaterhouseCoopers, working on over 200 mergers and acquisitions ranging in size from $5 million to $40 billion in enterprise value. He has over 15 years of experience in mergers and acquisitions, business risk and exposure, and actuarial science in the private sector.

Lisa Stanton, Chief Revenue Officer

Contact | (415) 930-9090
EducationBachelor of Business Administration, Southern Methodist University; Chartered Financial Analyst (CFA)

As Four Twenty Seven’s Chief Revenue Officer, Lisa oversees sales, client support, marketing and professional services globally. Lisa brings over 25 years of experience in sales and client services for data analytics and investment products in the financial sector.

Previously, Lisa spent twelve years with Barra, Inc. leading their client service, sales, consulting and partner relationships globally.  She has also led investment strategy and client relationship teams for Blackrock, AXA Rosenberg and, most recently, Grantham, Mayo, Van Otterloo, Inc., working with many of the world’s leading institutional investors.

Global Sales, Client Services and Marketing

Natalie Ambrosio, Director, Communications

Contact | (415) 930-9797
EducationBachelor of Science in Environmental Science, University of Notre Dame; Gallivan Program in Journalism, Ethics and Democracy, University of Notre Dame

As Director, Communications, Natalie leads Four Twenty Seven’s thought leadership, marketing and outreach efforts.

Natalie leverages her background in climate adaptation, communications and environmental sciences to translate technical information into actionable insights for resilience-building across sectors. Previously, Natalie worked at the Notre Dame Global Adaptation Initiative (ND-GAIN) where she helped to develop a nationwide assessment of cities’ vulnerabilities to climate change and their readiness to adapt.

Nathalie Borgeaud, Director, Europe

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EducationMaster of Business Administration, HEC Paris; Master of Science, Ecole des Mines de Paris; Licensed landscape architect, Ecole du Paysage de Versailles.

As Director Europe, Nathalie leverages her 30 years of experience in the banking industry in the U.S. and Europe to lead Four Twenty Seven’s work with financial institutions, corporations and governments in Europe.

For ten years Nathalie shaped the climate, environment and sustainability strategy of BNP Paribas Corporate and Investment Bank, in coordination with other main European financial institutions. She previously served as its Chief Innovation Officer after a fifteen year career as an investment banker focusing on emerging technologies for BNP Paribas and on emerging markets at Citi. Nathalie teaches sustainability and advises on related curricula development at Mines Paris Tech.

Ben Boukhobza, Director, Sales

Contact | +44.0.786-052-8722
EducationBachelor of Science in International Business with French and Spanish, Aston University, Birmingham

As Director, Sales in the UK, Ben leads Four Twenty Seven’s business development and growth strategy in the United Kingdom and Ireland.

Ben leverages ten years of experience across various roles within the Commercial Group at Moody’s Investors Service (MIS). Most recently Ben led the EMEA Sales Support team, having previously held roles ranging from sales and account management to operations and technology.


Léonie Chatain, Manager, Europe

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EducationMasters of Governing the Large Metropolis, Urban School of Sciences Po Paris; Bachelor degree in Political Science, Sciences Po Paris

As Manager, Europe, Léonie supports European client deliveries, sales and marketing from Four Twenty Seven’s Paris office. She translates Four Twenty Seven’s data into user-friendly products and visuals and develops risk analysis for financial institutions, corporations and governments.

Léonie has a background in political sciences and urban data analysis. Previously, she provided consulting on urban sustainability for a French construction firm.

Yoon Hui Kim, Ph.D., Managing Director, Global Client Services

Contact | (415) 930-9090, ext: 1002
EducationMaster and Ph.D. in International Development, University of Oxford; Bachelor of Science in Foreign Service, Georgetown University

As Four Twenty Seven’s Managing Director, Global Client Services, Yoon provides oversight on all aspects of client engagements. She works closely with investors, corporations, and governments to assess financial and economic exposure to physical climate risks, support the integration of climate risk considerations into planning, and promote cross-sector dialogue to address physical climate impacts.

Yoon has over a decade of experience working with private and public sector entities in the US and globally to evaluate physical climate risks, identify adaptation and resilience opportunities, support adaptation planning, strengthen climate policy and governance, and build capacity. Prior to Four Twenty Seven, she worked with several State of California agencies to prepare the coastal implementation plan for the State’s adaptation strategy and supported the US Agency for International Development’s (USAID) efforts to integrate adaptation considerations into country and regional investments.

Toshi Matsumae, Director of Japan

Contact | +81.8180.5426.4980
EducationMaster of Business Administration, Stanford University; Bachelor of Arts in Anthropology, Indiana University; Bachelor of Arts in History, Doshisha University.

As Director of Japan, Toshi leverages his 30 years of experience in sales and development to lead Japan operations and business development.

Having spent his career in financial services, Toshi has served as a Senior Advisor to S&P Global Platts, Japan President of FactSet, and Tokyo President for MSCI. Previously, he was Head of Goldman Sachs Pension Services Group Tokyo and has held several other roles in asset management and risk management firms.

Naoko Neishi, Associate, Sales

Contact | (415) 930-9090 Ext. 1004
EducationBachelor of Arts in Geography, University of California Los Angeles

At Four Twenty Seven, Naoko supports senior management and works with the Operations Manager to achieve operational excellence.

Naoko has over 16 years of experience as a sales assistant and office manager in the United States and Japan, working in the financial and engineering industries.

Lindsay Ross, Director, Global Client Services

Contact | (415) 930-9090
EducationMaster of Arts in International Economics, Johns Hopkins School of Advanced International Studies; Bachelor of Arts in International Affairs and Bachelor of Arts in French, University of Georgia

At Four Twenty Seven, Lindsay analyzes the economic impacts of climate change on corporations and financial markets.

Lindsay studied at the Johns Hopkins School of Advanced International Studies (SAIS), focusing on Energy, Resources, and the Environment as well as International Finance and Economics. Previously she worked for the U.S. International Trade Commission, assisting with macroeconomic research on the impacts of international trade on the U.S. economy. She also has experience as Student Coordinator for the Frontiers and Energy, Science, and Technology at SAIS, leading groups of students on international research trips to study the effects of climate change around the world.


Nik Steinberg, Managing Director, Research

Contact | (415) 930-9090, ext: 1003
EducationMaster in Water Resources Management, American University; Master in Natural Resources and Sustainable Development, United Nations Universidad para la Paz; Bachelor of Arts in International Development and Business Economics, University of Oregon

As Managing Director, Research, Nik leads the research team and guides the modeling efforts to assess the attributable impact of climate change on human health, supply chains, infrastructure and the natural environment.

As a climate and water risk specialist, Nik focuses on ways to assess climate and development induced risk through advanced statistics, climate change models and impact evaluation methods. Previously, he served as an environmental risk specialist in South Asia, the Middle East and Central and South America and has conducted environmental impact evaluations for USAID, US Department of State, Pacific Gas & Electric, NASA and the Millennium Challenge Corporation.


Colin Gannon, Director, Research

Contact | (415) 930-9090
EducationMaster of Arts in Climate and Society, Columbia University; Bachelor of Science in Environmental Science, Bryant University

At Four Twenty Seven, Colin assesses clients’ specific climate risk over space and time, helping to build products which integrate the most recent climate change datasets and research into a user-friendly interface.

Previously, Colin worked at the Red Cross/Red Crescent Climate Centre where he authored a report on near-term climate change in Zambia and its sector-specific impacts. Colin has a background in applied climate science, using computational statistics, geospatial analysis and business intelligence applications to process, analyze and communicate climate data.

John Naviaux, Associate Director, Research

Contact | (415) 930-9090
EducationMaster and Ph.D. in Environmental Engineering, Caltech; Bachelor of Science in Earth and Environmental Science, University of California Irvine; Bachelor of Arts in Business Economics, University of California Irvine

As an Associate Director, Research, John performs stochastic modeling of climate and weather data to advance Four Twenty Seven’s climate risk analytics.

Prior to joining the team, John worked on topics ranging from transportation economics in Los Angeles to particle physics at the Large Hadron Collider in Geneva, Switzerland. John went on to monitor arctic mercury pollution in Norway as part of a Fulbright Fellowship, and ultimately received his Ph.D. at Caltech for his research on the ocean’s response to climate change.

Josh Turner, Director, Research

Contact | (415) 930-9090
EducationMaster of Arts in Climate and Society, Columbia University; Bachelor of Science in Meteorology and Applied Mathematics, University of Miami

As a Director, Research, Josh curates datasets, applies data analysis and develops written and visual materials to convey clients’ specific climate risks.

Prior to Four Twenty Seven, Josh worked with the Red Cross/Red Crescent Climate Centre to establish a preliminary climate risk assessment for anticipatory humanitarian action in Lomé, Togo. Josh has a background in meteorology, climate data analysis and communication of complex scientific information.


Yvonne Burgess, Chief Systems Architect

Contact | (415) 930-9090
EducationMaster of Science in Systems Management in organization development and information technology, University of Southern California; Bachelor of Business Administration, National University

As Chief Systems Architect, Yvonne leverages her 25 years of experience in strategic systems planning to guide the development of data architecture and the development of secure online business intelligence solutions.

Prior to Four Twenty Seven, Yvonne supported all phases of systems development, from design through implementation, blending deep technical expertise with strategic planning and thought leadership. She translated the complexities of full supply chain economic input-output and environmental modeling for start-up Climate Earth, Inc. and as co-founder and COO of Apisphere, Inc. she helped conceive and launch location-awareness services for mobile business applications and devices. Yvonne also served as COO of Meedan, Inc., during their critical early growth.

Oren Israeli, Managing Director, Financial Data Systems

Contact | (415) 930-9090
EducationMaster of Business Administration, Golden Gate University; Bachelor of Business Administrations, Tel-Aviv College of Business Administration

As Managing Director, Financial Data Systems, Oren leverages his 20 years of experience in the fintech industry to guide Four Twenty Seven’s product development agenda for financial and business data.

Oren is recognized as a strategic data and content expert, adept at launching and overseeing products and solutions to serve the top investment firms globally. Prior to Four Twenty Seven, Oren spent 13 years at Axioma Inc. (now part of Qontigo), leading the Global Content Services group and he also spent seven years at MSCI Barra.


Klaus Fabian, Vice President of Engineering

Contact | (415) 930-9090
EducationMaster of Business Administration, Haas School of Business, University of California Berkeley; Diploma of Computer Science, RWTH Aachen, Germany

As VP of Engineering, Klaus draws on more than 25 years of experience in new product development to build Four Twenty Seven’s data platform.

Klaus co-founded and served as CTO of Incorta, a business intelligence and analytics software provider funded by Google Ventures and Kleiner Perkins. Previously he managed business intelligence and reporting software at Oracle, including BI Publisher and served as product manager for the Aegis Equity Portfolio Risk Analysis suite at MSCI (then Barra).

Alix Herrmann, Senior Software Engineer

Contact | (415) 930-9090
EducationPh.D. in Computational Neuroscience, Ecole Polytechnique Fédérale Lausanne, Switzerland; Bachelor of Science in Engineering & Applied Science, California Institute of Technology; Bachelor of Arts in Physics, Pomona College

At Four Twenty Seven Alix leverages over 25 years of experience in software engineering to expand Four Twenty Seven’s climate risk scoring capabilities.

Previously, Alix developed big data analytics for financial market trading at Instinet. She also has experience building neural network compilers, developing DSP-oriented mathematical libraries and creating ground-based radar signal processing pipelines.


Akiyo Marukawa, Frontend Developer

Contact | (415) 930-9090
EducationBachelor of Science in Aeronautical Engineering, Rensselaer Polytechnic Institute

As a Frontend Developer Akiyo  works on the Four Twenty Seven climate risk application’s user interface, building out the platform and systems to serve a diverse client base.

Previously, Akiyo developed web applications at the Lawrence Berkeley National Laboratory and has worked with Python and Flask on the backend. Her diverse background also includes process automation and systems engineering.

Mylo Stone, Data Engineer

Contact | (415) 930-9090
EducationBachelor of Arts in Physics, Cornell University

As a Data Engineer, Mylo draws on nearly three decades of software development and data architecture experience to design and implement data ingestion and processing best practices that enhance and automate Four Twenty Seven’s data platform.

At firms such as Blackrock, AXA Rosenberg, and Instinet, Mylo has worked alongside research teams to facilitate both the access and analysis of financial datasets and the implementation of research results into production trading systems.


Yang Jing, Controller

Contact | 415.930.9090
EducationMaster of Science in Management and Policy, Stony Brook University; Master of Arts in International Relations, Waseda University; Bachelor of Arts in English, Nanjing University; Certified Public Accountant (CPA)

At Four Twenty Seven, Yang implements efficient processes and policies in compliance with US and international accounting standards and Moody’s accounting policies. Yang is also responsible for accounting closes, Financial Planning & Analysis (FP&A) activities and liaising with Moody’s.

Yang is a Senior Vice President in Accounting for Moody’s, where she works with business leaders to ensure compliance with SEC and international accounting regulations while providing near real-time financial data to enable executive decision-making. Prior to Moody’s, Yang worked in various accounting and operational roles with UTStarcom and other startups in the Bay Area.

Sara O’Connell, Director of Operations

Contact | (415) 930-9090, ext: 1004
EducationBachelor of Arts in Communications, Portland State University

At Four Twenty Seven, Sara keeps operations running effectively and supports business development and product management.

Sara has over eight years of operations management experience in the technology sector and is passionate about building strong foundations and improving company systems. Previously, she held operational roles at startups ApplePie Capital and Pixalate.