William Joseph Brennan

CEO Chief Executive Officer

William Joseph Brennan, born in 1961, joined the GAGFAH GROUP as COO in January 2009 and took over the responsibility as CEO in April 2009.

Mr Brennan joined Fortress' London office in Sept 2008, prior to that he spent fifteen years with Cendant Corp (and successor company Wyndham Worldwide). With an audit background, Mr Brennan began his career with Cendant by taking on the senior financial role for their vehicle management operations in Germany, based in Munich.  After returning to the US, he continued as part of the Corporate Audit function, with responsibility for Cendant's European operations. In 1999 he moved to Cendant's RCI LLC subsidiary, leading the finance function for the North American region. Moving to London in 2004, he assumed senior roles in both Finance and Operations. With the combination of Cendant Europe's Vacation Rental Group and RCI Europe (EME), he was appointed as Chief Transformation Officer for the newly created RCI Global Vacation Network (EME) responsible for the integration of the business entities. After the successful transformation, Mr. Brennan took over the position as CFO of RCI LLC for Europe, Middle East, South Africa and India. He is responsible for Asset Management, Communications, HR, Internal Audit, Legal, Risk and Process Management. He is graduate of the University of Maryland.

Stephen Charlton

CFO Chief Financial Officer

Stephen Charlton was appointed to the management of GAGFAH GROUP as Chief Financial Officer in January 2011. He joined Fortress Investment Group in August 2004 as Chief Financial Officer of Eurocastle Investment Ltd, one of the largest listed owners of German commercial real estate. Prior to joining Fortress Mr. Charlton worked for Gordian Knot Limited where he spent 10 years also as Chief Financial Officer. While he was at Gordian he was part of the management team responsible for creating, and then managing, Sigma Finance Corporation, a limited purpose finance company with total investment grade assets of US$33 billion. From 1989 to 1994 Mr. Charlton was finance director of Sterling Trust Plc, a USM quoted financial services group. Prior to joining Sterling Trust, Mr. Charlton held financial management control positions with DKB International (the securities arm of Dai-ichi Kangyo Bank), Irving Trust Co and James Capel & Co (HSBC). Mr. Charlton started his career in London with Price Waterhouse (1980 - 1985) where he qualified as a chartered accountant.

Stefan de Greiff

CISO Chief Investment & Sales Officer

Stefan de Greiff  studied economics at WHU University in Vallendar, the Ecole de Management in Lyon, France, and at the Universidad de Alcalá de Henares in Alcalá de Henares, Spain, and graduated as Diplom-Kaufmann (business administration degree).
During the last nine years, Stefan de Greiff has held different positions in the real estate industry. After working as a consultant for Morgan Stanley and Leonardo & Co. he was a member of the private equity team of Fortress Investment Group in Germany and the USA.
Stefan de Greiff was appointed as CISO to the management board of GAGFAH GROUP on April 1, 2010.

Nicolai Kuß

COO Chief Operating Officer

Nicolai Kuß (*1974) studied Business Administration at the European Business School (ebs) in Oestrich-Winkel, the Ecole Supérieure de Commerce in Clermont-Ferrand, France and at the James Madison University in Harrisonburg, Virginia, USA and graduated as a Diplom Kaufmann (Business Administration degree, similar to MBA).
Nicolai Kuß has been working in various positions in real estate business for the past 11 years. After working as senior consultant for Arthur Andersen and Ernst&Young Real Estate for four years, he has been responsible for asset and investment management of residential property investments in the Fortress Investment Group in Germany since 2004.
On 20th March 2009, he was appointed to the management of GAGFAH GROUP as Chief Operating Officer. Nicolai Kuß manages the operational business of GAGFAH GROUP.