Chief Investment Officer

Charles Michaels is the CEO and co-founder of Sierra Global Management, an investment management firm launched in 1996 with holdings in European growth companies including Climate related companies. Sierra Global invests across the clean technology spectrum using insight from climate science to channel capital to companies with promising renewable energy, circular economy and energy conservation technologies. Mr. Michaels was born in Madrid, Spain, and has lived in Germany, Italy, Switzerland and the United Kingdom. Mr. Michaels worked for Goldman Sachs in London and Zürich where he co-founded the Company’s European equities business.

Mr. Michaels graduated from UC Berkeley in 1978 with a BS degree in Business Administration and from Columbia Business School with an MBA in 1986. He is also a CFA® charterholder. While at UC Berkeley, he became deeply interested in what today is known as “sustainability.”  This led to his support for the funding and founding of UC Berkeley’s Haas Sustainable Investment Fund in 2007, for which he continues to serve as an Advisory Board member. He also sponsors the new Michaels Graduate Certificate in Sustainable Business at the Haas School of Business. Additionally, Mr. Michaels serves as an advisory board member for Columbia University’s new Climate School.

Climate Science Advisor

Professor Daniel Kammen, Climate Science Advisor, holds a Doctorate in Physics from Harvard and is a professor of Energy at UC Berkeley with parallel appointments in the Energy and Resources Group, Goldman School of Public Policy and the department of Nuclear Engineering. He is the founding director of the Renewable and Appropriate Energy Lab (RAEL). He has founded or is on the board of ten companies and has served the State of California and US federal government in expert and advisory capacities.

He served as Science Envoy for the Obama-Biden Administration in the State Department and was the Chief Technical Specialist at the World Bank for Renewable Energy and Energy Efficiency. Dr. Kammen has served as a contributing or lead author for the Intergovernmental Panel on Climate Change (IPCC) since 1999. The IPCC shared the 2007 Nobel Peace Prize with Al Gore for their report, Climate Change 2007, assessing man-made global warming.

Director of Research

Stefan Alb is the Director of Research, focusing on a wide variety of industries. Mr. Alb was a founding member of Sierra’s investment team in 1996, and after leaving Sierra to invest on his own behalf in his home country of Romania in early 2005, he later re-joined the investment team in June 2008. In addition to his analytical responsibilities, Mr. Alb was in charge of trading and risk monitoring at Sierra from 1996-2000.

For two years prior to Sierra, he was a financial analyst in Goldman Sachs’s European equities department. While attending James Madison University, Mr. Alb worked as a financial analyst and consultant in the office of the President and CEO at W.R. Grace & Co., a Fortune 500 company focusing on mergers and acquisitions as well as company and industry analyses (1992-1994). Mr. Alb graduated with a B.S. in Economics from James Madison University in 1994 and is a Romanian citizen.

Stefan is the father of three children and is an avid runner.


Daniel Glatt is the President of Sierra and has been with the company since November 2013. Prior to joining Sierra, Mr. Glatt worked as a data analyst at Tudor Investment Corporation (2010-2013) in their Market Data group. While at Tudor, he optimized data retrieval and analysis solutions for portfolio managers and algorithmic trading groups.

Prior to Tudor, Mr. Glatt worked as a Business Development summer analyst at Gerstein Fisher. Mr. Glatt received his B.A. degree magna cum laude, in Economics from Middlebury College in 2010. He is conversational in Spanish, having minored in Spanish Language and studied for a semester at the Universidad de Valparaiso in Chile.

Dan is a competitive ultimate frisbee player and his team finished second in the World Ultimate Frisbee Club Championships in 2018. Dan has one child, a daughter named Sadie.

Senior Analyst

Elie Mekanna is a senior analyst with generalist responsibilities. Prior to joining Sierra in December 2017, Mr. Mekanna worked as a Quantitative Analyst at J.P Morgan (2015-2017) in their Equity Derivatives group. Prior to that, Mr. Mekanna worked as Quantitative Analyst at Deutsche Bank (2014-2015), as part of their Deutsche Bank Analytics team. After graduating from the American University of Beirut with a B.E in Electrical & Computer Engineering (2011), Mr. Mekanna interned as an investment banking analyst at Bemo Securitization in Beirut, working on capital raising and securitization projects.

Mr. Mekanna also holds a M.A in Mathematics with specialization in the Mathematics of Finance from Columbia University, graduating in 2013. Mr. Mekanna is fluent in Arabic and conversational in French.

COO, Director of Operations

Susan DeCanio is the Chief Compliance Officer and Director of Operations and has been with Sierra since 1996. She is responsible for all settlements, reconciliation, and trading activities as well as compliance related aspects for the firm. She came to Sierra Global from Capital Investments International, a broker-dealer firm where she worked with analysts to gather research and assisted the sales team.

Ms. DeCanio holds a degree from Long Island University.

Head of Sustainability

Antonio Ciudad Casafranca is the Head of Sustainability. Born in Lima, Peru, he attended a German Peruvian school where he completed the German Abitur. He studied both Economics and Business at Universidad del Pacífico in Lima and pursued his exchange-student program at Universität St. Gallen in Switzerland. Mr. Ciudad recently received his MBA from the Haas School of Business at the University of California Berkeley with a focus in Business Analytics. He was a Principal of the Haas Sustainable investment fund, a student run fund founded by Charlie Michaels in 2007.

Mr. Ciudad worked for over 4 years at Peru’s largest bank, Banco de Crédito del Peru-BCP, where he held key strategic roles. Apart from his mother tongue Spanish, Mr. Ciudad is fluent in German, French and English having studied and lived in both Germany and Switzerland in different periods of his life. Volunteered for five years at PANSOY, an NGO that helps approximately 700 low-income microentrepreneurs build their food business with a socially responsible mission. Antonio is a lifelong passionate swimmer and athlete and set a national swimming record in Peru.

Responsible Business Investment Advisory Group

Dr. Kellie McElhaney, PhD is the Founding Director of the Center for Equity, Gender, and Leadership (EGAL) and is on the faculty at the Haas School of Business at the University of California, Berkeley. A passionate believer in the potential and power of business to make positive change, Kellie has spent her career in that pursuit.

Through provocative thought-leadership, evidence-based storytelling, and courageous and bold action, Kellie has challenged and supported business leaders, organizations and students to address some of society’s biggest challenges.

Responsible Business Investment Advisory Group

Marcela Manubens is an expert on human rights and social impact at Unilever and has immersed herself in numerous social impact roles. Ms. Manubens joined Unilever in 2013 and led the creation of its social sustainability strategy and global goals, resulting in the expansion of the Unilever Sustainable Living Plan, incorporating Enhancing Livelihoods three pillars: fairness in the workplace, opportunities for women, and inclusive business models.

Previously, she established one of the first Global Human Rights and Social Responsibility programs in the fashion industry at PVH.

Responsible Business Investment Advisory Group

Joshua Grant is the Founder and CEO of Kukua. He began his career in the UK Government at the Department for Business, Innovation and Skills (“BIS) working on Responsible Capitalism initiatives. He subsequently spent time in the Department for International Development (“DFID”), the UK Governments department on international and sustainable development, where he worked on private sector and sustainable development in developing countries.

Whilst in government, Joshua recognized the growing importance of Responsible Investment (“RI”); Environmental, Social and Governance (“ESG”); and Sustainable Finance in the global financial markets, the value and opportunity for them in driving this agenda forward, together with the inherent challenges for them in doing so. He subsequently founded KUKUA, a leading advisory business, to fulfill the needs of asset owners, investment managers and the wider financial services sector on how to integrate RI, ESG, and sustainability considerations into their business and investment decisions.