Köllen T, Compassion as the key to organizing human-animal relations in a morally better way: A Schopenhauerian perspective. EGOS Colloquium, Cagliari, Italy, 6.-8.7.2023
Köllen T, Fontana E, Siriwichai P, Within and beyond the gender binary: Transgender employees’ gender performance at work. European Academy of Management (EURAM), Winterthur, Switzerland, 15.-17.06.2022
Fontana E, Köllen T, Siriwichai P, How changes in the self-concepts of transgender persons shape the essence and interplay of their activist and occupational careers. EGOS Colloquium, Vienna, Austria, 7.-9.7.2022
Ozbilgin M, April K, Köllen T, Taksa L, Takkenberg H, Villeseche F, The future of work and precarity: Shaping a new normal for diversity and equality (panelist of PDW). Academy of Management, Seattle, USA, 5.-9.8.2022
Fontana E, Köllen T, Siriwichai P, Trashing or rather thrashing out the gender binary? Trans employees’ gender performance at work. Academy of Management, Seattle, USA, 5.-9.8.2022
Köllen T, Organizational constraints regarding LGB leadership development, In the PDW on 'Sexual orientation & leadership: Constraints & vehicles for aspiring LGB leaders'. AoM, Vancouver, Canada (online), 7.-11.8.2020
Köllen T, Delmestri G, Schneeberger D, [presenter: Doris Schneeberger] Overcoming anthropocentrism in business ethics – On the integration of non-human animals into the remit of corporate responsibility. EGOS Colloquium, Hamburg, Germany (online), 2-4.7.2020
Köllen T, LGBT Diversity Management: „Geschlechtsidentität“ und „sexuelle Orientierung“ in der Organisations- und Managementforschung. Keynote address at Fachtagung und wissenschaftliches Vernetzungstreffen der Diversity-Forschenden aus Deutschland, Österreich und der Schweiz, St. Gallen, Switzerland, 26.- 27.8.2019
Panelist on" Homosexuality and Football" (together with Marcel Gisler, Pascal Erlachner, Gabi Fiedler and Sven Kistner). Fachtagung und wissenschaftliches Vernetzungstreffen der Diversity-Forschenden aus Deutschland, Österreich und der Schweiz + St. Galler Diversity & Inclusion Tagung, 26.-28.8.2019
Köllen T, Managing sexual orientation and gender identitiy diversity: A Review and outlook. Keynote address at the European Academy of Management (EURAM), SIG Gender, Race and Diversity in Organisations (GRDO), Lisbon, Portugal, 26.-28.6.2019
Köllen T, Koch A, Hack A, Negotiating national Identities at work (Topic). European Academy of Management (EURAM), Reykjavik, Iceland, 19.06.-22.06.2018
Köllen T, The impact of diversity management practices on organizational diversity climates: A conceptual framework. 10th Equality Diversity and Inclusion Conference, London, Great Britain, 28.06.-30.06.2017
Metcalfe BD, Kazeroony H, Pio E, Köllen T, du Plesses Y, The politics and organisation of gender, race and diversity in the digital era (plenary session). European Academy of Management (EURAM), Glasgow, Scotland, 21.6.-24.6.2017
Köllen T, Declining career prospects as “transition loss”? On the career development of transgender employees. Administrative Sciences Association of Canada (ASAC) Conference, Edmonton, Canada, 4.6.-6.6.2016
Pulcher S, Guerci M, Köllen T, [presenter: Simone Pulcher] LGBT-friendly organizations in Italy: Which institutional entrepreneurs led to the adoption of institutionally controversial practices? EGOS Colloquium, Copenhagen, Denmark, 6.-8.7.2017
Köllen T, Kopf S, Rankin T, Negotiating national identities in the workplace (Topic). Eastern Academy of Management (EAM), New Haven, USA, 4.5-7.5.2016
Joch M, Köllen T, Diversity management beyond good and evil: A Nietzschean view on the (moral) value of inequality. Philosophy of Management, Oxford, UK, 14.7.-18.7.2016
Köllen T, Intersexuality and trans-identities within the diversity management discourse. Proud conference: In Europe? LGBTI emancipation in comparative perspective, Amsterdam, Netherlands, 4.8.-6.8.2016
Köllen T, Reconceptualizing profit-orientation in management: A Karmic view on 'return on investment' calculations. EBEN Research Conference (Philosophical Foundations of Business Ethics), Copenhagen, Denmark, 1.10.-3.10.2015
Köllen T, Delmestri G, Overcoming anthropocentrism in business ethics - On the integration of 'animals' into the remit of corporate responsibility. Philosophy of Management Conference, Oxford, UK, 9.7.-12.7.2015
Köllen T, A climate for not working “undercover”? The interrelation between the perceived working climate and the way in which lesbian and gay employees manage their sexual orientation at work. European Academy of Management (EURAM), Warzaw, Poland, 17.6.-20.6.2015
Köllen T, Rankin T, Negative stereotyping of Germans in Austria: The nature and perception of linguistic lines of demarcation in the workplace. 9th International GEM&L Workshop, Helsinki, Finland, 10.6.-12.6.2015
Köllen T, Acting out of compassion, egoism and malice: A Schopenhauerian view on the moral worth of CSR and diversity management practices. Philosophy of Management, Chicago, USA, 14.7-16.7.2014
Köllen T, Banking on climate change: The impact of diversity management on the working climate for gays and lesbians. EURAM, Valencia, Spain, 3.6.-7.6.2014
Greth J, Köllen T, The construction of "Being German" in the Austrian workplace. Equality Diversity and Inclusion (EDI), Athens, Greece, 1.7.-3.7.2013
Köllen T, Coming out at work - The impact of gay and lesbian employees' age, gender, religious beliefs, relationship-status, mobility, and migration-background. EURAM, Istanbul, Turkey, 26.6.-29.6.2013
Köllen T, Diversity Management in Brasilien, Deutschland und Österreich: Eine vergleichende Forschungsperspektive zur jeweiligen Rolle der USA, Forschungsseminar des Department Management der WU Wien, Wien, Österreich, 14.1.2013
Köllen T, Bendl R, Steinbacher S, The significance of the “LGBT-community” for homosexual entrepreneurs - Influencing factors and consequences. 7th European Conference on Innovation and Entrepreneurship, Santarem, Portugal, 20.9.-21.9.2012
Bendl R, Steinbacher S, Köllen T, [presenter: Sabine Steinbacher] Shared spaces and no-go-areas - Boundary drawing by lesbian and gay entrepreneurs. 5th Equality, Diversity and Inclusion International Conference, Toulouse, France, 23.7.-25.7.2012
Lazar S, Köllen T, Gay tourism in Budapest: An explorative study. 41st Annual Conference of the European Marketing Academy (EMAC), Lisbon, Portugal, 22.5.-25.5.2012
Köllen T, Góis J, Hanappi-Egger E, National differentiations of diversity management: A conceptual framework for a European - South American comparison. 12th International Diversity in Organizations, Communities and Nations Conference, Vancouver, Canada, 11.6.-13.6.2012
Köllen T, Between stabilizing and dissolving inequalities within organizations: The impact of diversity management focusing on 'sexual orientation'. VIII IASSCS Conference: Naming and Framing - The Making of Sexual (In)Equalities, Madrid, Spain, 6.7.-9.7.2011
Köllen T, European disintegration: Tendencies of renationalization within the European Union and its impact on the common labor market and EU consumer markets. 11th International Conference on Diversity in Organizations, Communities & Nations, Cape Town, South Africa, 20.6.-22.6.2011
Köllen T, The contribution of diversity management to create a supportive working climate for gays and lesbians. Going Diverse: Innovative Answers to Future Challenges, Aachen, Germany, 29.10.-30.10.2009
Gartner H, Köllen T, Anstoss zu organisationalem Wandel durch komische Artefaktinszenierungen. 3. Fachtagung der “Gender and Diversity Management Studies in Österreich, Deutschland und der Schweiz", St. Gallen, Switzerland, 28. - 30.5.2009
Köllen T, Die Bedeutung des Arbeitsklimas für die arbeitsplatzbezogenen Selbstentwürfe von Lesben und Schwulen - Eine Heideggersche Perspektive auf die Ergebnisse einer quantitativen Erhebung in Deutschland. 3. Fachtagung der “Gender and Diversity Management Studies in Österreich, Deutschland und der Schweiz", St. Gallen, Switzerland, 28. - 30.5.2009
Köllen T, The contribution of diversity management to create an inclusive workplace climate for employees of all sexual orientations. UEEH 2009 XV rencontres lesbigaytransqueer – Universités d´été Euroméditerranéennes des Homosexualités, Marseille, France, 16.7.-25.7.2009
Mensi-Klarbach H, Köllen T, Hanappi-Egger E, Diversity management: Economically reasonable or “only" ethically mandatory. 7th International Conference on Diversity in Organizations, Communities and Nations, Amsterdam, Netherlands, 3.7.-6.7.2007
Köllen T, Part of the whole: Homosexuality as part of company diversity policy. 7th International Conference on Diversity in Organisations, Communities and Nations, Amsterdam, Netherlands, 3.7.-6.7.2007
Köllen T, Diversity management: An organizational strategy dealing with homosexuality in business. UEEH 2006 XII rencontres lesbigaytransqueer, Universités d´été Euroméditerranéennes des Homosexualités, Marseille, France, 17.7-24.7.2006
Hanappi-Egger E, Köllen T, Strengthening innovative ability in technology-intensive organizations: A question of (gendered) working conditions? 22nd EGOS Colloquium, Bergen, Norway, 6.7-8.7.2006