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Research assistants

M.Sc. Philipp Julian Ruf

Julian Ruf
Tel.: +49 (0) 271/ 740 - 3018
Room: US-A-129

Professional Development

Bachelor of Business Administration  Netherlands / The Hague

Master of Science in Entrepreneurship and SME Management at the University of Siegen

Graduate Research Assistant SME Graduatschool Siegen

Graduate Research Assistant Chair for Entrepreneurship and Family Business


Philipp-Julian Ruf studied Hospitality Management at Hotelschool The Hague and graduated in 2015 with a bachelor’s degree in Business Administration. Before his studies he completed an apprenticeship as a Restaurant Expert. Furthermore, he has gained practical experience during internships at Hospitality consultancy companies as well as student assistant positions. Currently he he is doing his Ph.D., after finishing his master’s degree in Entrepreneurship and SME Management at the University of Siegen with distinction in October 2017. Furthermore he is a graduate research assistant at the SME Graduate School and working for the Chair of Entrepreneurship, Family Business and Business Succession of the University of Siegen. His research is focused on strategic management, Family Businesses, SMEs and their apparent competitive advantage.


"European Academy of Management" (EURAM), Lisbon, Portugal 26.06. - 28.06.2019

"Babson College Entrepreneurship Research Conference" (BCERC), Babson College in Boston, Massachusetts, USA 05.06. - 08.06.2019

"Konferenz der deutschsprachigen Forschungszentren und Institute für Familienunternehmen" (FIFU), Bielefeld University, Germany 11.03. - 12.03.2019

"International Family Enterprise Research Academy" (IFERA), Windesheim University of Applied Sciences in Zwolle, Netherlands 03.07. - 06.07.2018

"Family Enterprise Research Conference" (FERC), Universidad Panamericana, Guadalajara, Mexico 07.06 - 10.06.2018

"New Directions in Entrepreneurship Research", UAB Barcelona, Spanien, 22.03. - 23.03.2018

"FOKO Bern-Linz-Siegen", Universität Bern, Schweiz, 04.02. - 06.02.2018


“Values, SEW and Performance in Family Firms.” Ruf, P.J., Graffius, M., Wolff, S., Moog, P.M, Schell, s. – Status: WIP

"Opportunity or Pitfall: The Unique Connection of Governance and Intrapreneurial Activity in Family Firms"  Köhn, P., Ruf, P.J., Moog, P. M. – Status: WIP

"Values as Antecedents of Socio-Emotional Wealth Behavior in Family Businesses" Ruf, P.J., Moog, P.M., Belausteguigoitia-Rius, I. – Status: Accepted for publication in the International Journal of Entrepreneurship and Small Business

Research Focus

Family Business Strategy

Values, Moral and Ethics in Family Businesses