Marc E. Hirtler holds a degree in Economics 1984 of Albert-Ludwig-Universität in Freiburg/Germany and is an alumnus of Harvard Business School in Boston/USA, Strategic Marketing Management 1994, Finance for Senior Executives 1995, The General Manager Program 2002.

He was Head Private Wealth Management of Bank Sal. Oppenheim in Frankfurt/Germany 1999-2004, with Goldman Sachs in Frankfurt 2004-2008, responsible for UHNW-clients, and equity partner of a family office in Zurich/Switzerland.

HIRTLER REAL ESTATE was set up in 2013. Marc is managing director of a private real estate investment firm in Frankfurt, Opus One Real Estate GmbH, and managing consultant to a significant private real estate portfolio in Germany. He is a member of the supervisory board of an international business consulting firm in Stuttgart/Germany, avano AG.

Real Estate, Market Research and Organisation

Steffen Große-Ruyken holds diplomas in Banking and in Business Administration. After graduating Steffen worked in the USA with M&I Madison Capital and Valuation Group, Madison in Wisconsin. Coming back to Germany he successfully worked in Private Banking with Deutsche Bank, HVB and Credit Suisse. From 2003–2014 he was Head of Health Care of TRIAS Insurance Group and since 2015 is a director of HIRTLER RE GMBH.

Steffen is a board member of Fördergesellschaft Forschung Tumorbiologie e.V. and he is a Knight of the Equestrian Order of the Holy Sepulchre of Jerusalem.

Real Estate and Curation of the Gerd Grimm Exhibition

Mirjam Allgaier, having studied Germanistik at the University in Basel in Switzerland and Wuppertal in Germany, worked for a well-known law firm in Wuppertal. After having taken gap years for the education of her children, she followed her interest to study homeopathic medical care, the Feldenkrais Method, and earned the license to practice. Mirjam is a member of HIRTLER REAL ESTATE and she is curator of the Gerd Grimm Exhibition in our offices.