43 W 23rd Street

NY 10010

+1 617 420 8000

43 W 23rd Street

NY 10010

+1 617 420 8000

About Us

Sigma Ratings, Inc. is an MIT-backed non-credit rating agency comprised of business leaders and talented engineers. We are re-defining the way the world sees risk and are utilizing deep domain expertise and cutting-edge computer science to both rate and generate risk scores on thousands of companies around the world.

Our Expert Team

Stuart Jones, Jr.

Founder & Chief Executive Officer
Stuart is a former senior U.S. Treasury official, including extended leadership tours in Afghanistan and the Middle East. For his service, Stuart received the Secretary’s Honor Award and the Treasury Department’s Meritorious Service Award. After his government service, Stuart worked as an executive with Ernst & Young, one of the world’s largest audit and advisory firms, where he led business and strategic growth in select emerging markets for the forensics business. Stuart is a graduate of MIT, St. Andrews and the The American University.

Gabrielle Haddad

Founder & Chief Operating Officer
Gabrielle worked as a senior M&A corporate governance attorney in New York, New York and as an executive in one of the world’s largest development finance organizations based in Switzerland. Gabrielle is a graduate of MIT, George Washington Law School and Villanova. While at MIT, Gabrielle won the IBM AI Hackathon and was active in broadening Sloan’s efforts around governance and ethics.

Laura Edelson

Chief Scientist
Laura is a Computer Science PhD candidate at NYU. Prior to NYU, she worked as a senior engineer at both Palantir and FactSet. In addition to her academic and engineering pursuits, Laura maintains an active leadership role in the IEEE.

Anthony Diaz

Director of Global Growth
Anthony Diaz is a sophisticated communicator, leader, and manager, with a proven record of accomplishment advancing American foreign policy in the Horn of Africa, Latin America, the Middle East, and Western Europe. Anthony is uniquely qualified and equipped to help clients navigate an increasingly complex world, as he is both a combat veteran and distinguished foreign service officer. He holds an advanced degree in strategic studies and international economics from The Johns Hopkins University, Paul H. Nitze School of Advanced International Studies.

Cole Page

Manager of Data Research
Cole Page graduated from George Washington University with a Bachelor of Science in Mechanical Engineering with an Aerospace concentration and a double major in Economics. Cole is extremely passionate about data analytics and statistics. When not working on Sigma Ratings, he builds algorithms to mathematically model the game of basketball.

Our Advisors

Staci Warden

Staci Warden is executive director of the Center for Financial Markets at the Milken Institute, where she leads initiatives on strengthening capital markets, access to capital, financial education, and financial-markets solutions.
Warden is also chair of the Rwandan Capital Markets Authority. Previously, she spent six years at JPMorgan in London, where she ran its Central Bank client franchise in Europe, Eurasia, and Africa, and two years in New York as part of the sovereign DCM deal team. Earlier, she was a director at NASDAQ and led its two initiatives for micro-cap companies, the BBX and the OTCBB. Warden has managed, advised, and written on international finance and economic development issues at the Milken Institute, J.P. Morgan, the U.S. Treasury Department, the Center for Global Development, the Carnegie Endowment for International Peace, and the Harvard Institute for International Development. She holds numerous board appointments and has worked or done business in more than 50 countries. She holds advanced degrees from the Kennedy School of Government at Harvard University and Brandeis University.

Karen Golz

Karen Golz served as the Global Vice Chair, Professional Practice/senior leader of Ernst & Young (EY), a global professional services firm with revenues of $29.6 billion. Sustained track record providing valued strategic advice. Deep experience with Global 500 organizations in a variety of industries as well as high- growth start-ups. Solutions oriented, with extensive international experience, including on the ground in Europe and Asia.
The most senior accounting, auditing and ethics professional at EY globally for more than nine years.
Caring and inspiring leader of EY’s professional practice and independence groups with hundreds of personnel in over 150 countries. Responsible for all aspects of accounting, auditing, financial and corporate reporting, internal control, regulatory, risk and ethics matters. Deep knowledge and practical working expertise with regulators and standard setters around the world.
This includes the US Securities and Exchange Commission (SEC), the US Public Company Accounting Oversight Board (PCAOB), the International Forum of Independent Audit Regulators (IFIAR), the International Auditing and Assurance Standards Board (IAASB), the International Ethics Standards Board (IESBA) and the International Accounting Standards Board (IASB).
Trusted and respected advisor to EY’s Global Executive Board, and leadership based on judgement, strong crisis response/ management skills, energetic, creative and pragmatic problem solving, and regulatory and global client service experience.

Anantha Chandrakasan

Anantha P. Chandrakasan is dean of MIT’s School of Engineering, and the Vannevar Bush Professor of Electrical Engineering and Computer Science. Chandrakasan co-chairs the new MIT–IBM Watson AI Lab, along with Dario Gil, IBM Research VP of AI and IBM Q.
Anantha P. Chandrakasan received the B.S, M.S. and Ph.D. degrees in Electrical Engineering and Computer Sciences from the University of California, Berkeley, in 1989, 1990, and 1994 respectively. Since September 1994, he has been with the Massachusetts Institute of Technology, Cambridge, where he is currently the Vannevar Bush Professor of Electrical Engineering and Computer Science.

Rating Committee


Mark has more than 35 years of experience working with international banks and has witnessed the pace of disruption and regulatory change over the years. His experience has encompassed regulatory change management driven from a first line of defense perspective, restructuring, repositioning and managing different bank business lines.
Mark has expert knowledge of banking sectors in many countries including the developing economies working with both financial institutions and corporate clients. His current focus is working with financial institution clients to develop intelligent and proportionate correspondent banking risk controls.

Zach Goldman

Zachary K. Goldman is the Executive Director of the Center on Law and Security at NYU School of Law. Zachary returned to NYU after having served for several years in the US government. He first served as a policy advisor in the US Department of the Treasury’s Office of Terrorism and Financial Intelligence, where he was the subject matter expert on terrorist financing in the Arabian Peninsula, and worked on the development of Iran sanctions policy.
He then served at the US Department of Defense as a Special Assistant to the Chairman of the Joint Chiefs of Staff. In the private sector, Zachary worked in the litigation department of Sullivan & Cromwell LLP in New York. He has published on national security strategy, financial sanctions, cybersecurity, counterterrorism, and US foreign policy in outlets such as The New York Times, Foreign Affairs, Political Science Quarterly, Cold War History, The Atlantic, The Diplomat, The National Interest, and others. He is the co-editor, with Samuel Rascoff, of Intelligence Oversight: A Global View, an edited volume on comparative approaches to intelligence oversight, which will be published by Oxford University Press in 2016. Zachary is a Term Member of the Council on Foreign Relations, and an Adjunct Senior Fellow at the Center for a New American Security. He received his JD from New York University School of Law, his Masters in International Relations from the London School of Economics, and his BA from Harvard University.

Scott Nance

Scott serves as consulting counsel to Wiley Rein LLP. He has practiced in the area of international trade regulation and investment law since 1984, focusing largely on compliance with economic sanctions, anti-money laundering, and export control laws.
He represents domestic industries and foreign companies in antidumping and countervailing duty cases before federal agencies and federal courts. In addition, Scott is heavily involved in international trade and economic policy, including such issues as currency manipulation, and has advised a variety of foreign governments in Africa and Asia on these issues. He has written numerous articles and studies, both legal and economic, of various aspects of international trade policy.

Strategic Relationships