Question: What position did Eileen Murray hold at the American investment management firm founded by Ray Dalio?

Context paragraphs:
Orbis Investment Management: Orbis Investment Management is an investment management firm headquartered in Bermuda, with offices in London, Vancouver, Sydney, San Francisco, Hong Kong, Tokyo and Luxembourg.  The company has a close relationship with Allan Gray Investment Management in South Africa and Allan Gray Australia.  Orbis manages approximately $25 billion on behalf of both institutional and individual investors.  Orbis Access, its direct-to-consumer platform, was launched in the UK in January 2015.

Southeastern Asset Management, Inc.: Southeastern Asset Management is an employee-owned, global investment management firm founded in 1975 by O. Mason Hawkins and the investment advisor to the Longleaf Partners Funds, a suite of mutual funds and UCITS funds.  Southeastern has approximately 60 employees worldwide, as of December 2013, and is headquartered in Memphis, Tennessee, with additional offices in London, England; Singapore; and Sydney, Australia.  As of December 2013, the firm had $35 billion in assets under management.

PIMCO: Pacific Investment Management Company, LLC (commonly called PIMCO), is an American investment management firm headquartered in Newport Beach, California, with over 2,000 employees working in 13 offices across 12 countries, and $1.51 trillion in assets under management as of 30 June 2016.  The company provides mutual funds and other portfolio management and asset allocation solutions for millions of investors worldwide.  PIMCO offers a broad list of investment strategies that encompass the entire risk spectrum and capital structure, including core bonds and credit, structured credit, alternatives, real assets, equities and currencies.

Renaissance Technologies: Renaissance Technologies LLC is an East Setauket, New York-based American investment management firm founded in 1982 by James Simons, an award-winning mathematician and former Cold War code breaker, which specializes in systematic trading using only quantitative models derived from mathematical and statistical analyses.  Renaissance is one of the first highly successful hedge funds using quantitative trading—known as "quant hedge funds"—that rely on powerful computers and sophisticated mathematics to guide investment strategies.

Richard C. Blum: Richard Charles Blum (born July 31, 1935) is an American investment banker.  He is the husband of United States Senator from California Dianne Feinstein.  He is the chairman and president of Blum Capital, an equity investment management firm that acts as general partner for various investment partnerships and provides investment advisory services.  Blum also serves in various boards of directors of several companies, including CB Richard Ellis.  He is also a regent of the University of California, where until May 2009 he served as the chairman of that board.

Winton Group: Winton Group, Ltd (which includes Winton Capital Management) is a British investment management firm founded by David Harding.  It is a quantitative investment manager whose trading decisions are guided by models developed from scientific research and mathematical analysis.  In the United States, Winton is registered with the Securities and Exchange Commission as an investment advisor and with the Commodity Futures Trading Commission as a CTA, and is authorised by the Financial Conduct Authority in the UK.  The company trades on more than 100 global futures markets in a wide variety of asset classes and on global equity markets.  The firm was launched with $1.6 million in 1997 and as of 2016 it held $32 billion in assets under advisement.  Winton Group has nine offices around the world: London, Oxford, Hong Kong, New York, Shanghai, Sydney, San Francisco, Tokyo and Zurich.

Bridgewater Associates: Bridgewater Associates is an American investment management firm founded by Ray Dalio in 1975.  The firm serves institutional clients including pension funds, endowments, foundations, foreign governments, and central banks.

Brandywine Asset Management: Brandywine Asset Management, Inc. is an American investment management firm founded and managed by Michael Dever.  The firm is registered as a commodity trading advisor.

Fortress Investment Group: Fortress Investment Group is an investment management firm based in New York City.  When, Fortress launched on the NYSE on February 9, 2007 with Goldman Sachs and Lehman Brothers underwriting the IPO, it was the first large private equity firm in the United States to be traded publicly.  As of June 30, 2016, the firm managed approximately $70.2 billion alternative assets in private equity, liquid hedge funds and credit funds.  In 2014, Fortress Investment Group was named "Hedge Fund Manager of the Year" by "Institutional Investor" and "Management Firm of the Year" by "HFMWeek".  Fortress has previously been recognized by "Institutional Investor" as “Discretionary Macro-Focused Hedge Fund of the Year” for 2012, and “Credit-Focused Fund of the Year” for both 2011 and 2010.

Eileen Murray: Eileen Murray (born 1958) is an American financial services executive and is co-CEO at Bridgewater Associates.  Murray has held executive positions at Morgan Stanley, Credit Suisse First Boston, Duff Capital Advisors and Investment Risk Management.  She was named one of the 25 Most Powerful Non-Bank Women in Banking, by U.S. Banker magazine, for the years 2007 and 2008.

Supporting paragraphs: Eileen Murray Bridgewater Associates
Answer: co-CEO