| 01.06.2015 - 04.06.2015 | 24th European Biomass Conference and Exhibition (EUBCE 2015) |
| 01.06.2015 - 03.06.2015 | 20th Symposium on Access Control Models and Technologies (SACMAT) 2015 |
| 03.06.2015 - 06.06.2015 | International Society for Information Studies (ISIS) Summit 2015 |
| 05.06.2015 - 05.06.2015 | Vienna Conference for Ophthalmic Educators |
| 06.06.2015 - 09.06.2015 | Congress of the European Society of Ophthalmology (SOE) 2015 |
| 07.06.2015 - 10.06.2015 | Conference of Biopartitioning and Purification (BPP) 2015 - organized by the European Society of Biochemical Engineering Science (ESBES) |
| 08.06.2015 - 12.06.2015 | The International Chamber of Commerce (ICC) Austria: Trade Finance Week 2015 |
| 08.06.2015 - 09.06.2015 | Digital Leadership Forum 2015 |
| 08.06.2015 - 10.06.2015 | 4th Meeting of the Association of the European Operational Research Societies (EURO) Working Group, on Vehicle Routing and Logistics Optimization (VeRoLog) |
| 08.06.2015 - 09.06.2015 | The International Chamber of Commerce (ICC) Austria: 10th Global Conference on Bank Guarantees |
| 08.06.2015 - 11.06.2015 | 20th International Conference on Radionuclide Metrology and its Applications (ICRM) 2015 |
| 09.06.2015 - 10.06.2015 | Forum für medizinische Fortbildung: EKG (Elektrokardiographie) Update Refresher |
| 09.06.2015 - 13.06.2015 | Forum für medizinische Fortbildung: Innere Medizin Update Refresher |
| 10.06.2015 - 13.06.2015 | Forum für medizinische Fortbildung: Allgemeinmedizin Update Refresher |
| 11.06.2015 - 12.06.2015 | European Textile Services Association (ETSA) Members Conference 2015 |
| 11.06.2015 - 12.06.2015 | Die internationale Management Konferenz: Failures & Successes in Processes, Projects, Changes and Business Analyses |
| 11.06.2015 - 14.06.2015 | 20th Congress of the European Hermatology Association |
| 11.06.2015 - 12.06.2015 | Forum für medizinische Fortbildung: Diabetes Update Refresher |
| 11.06.2015 - 12.06.2015 | The International Chamber of Commerce (ICC) Austria: 9th Global Conference on Letters of Credit |
| 11.06.2015 - 00.00.0000 | Happy Projects 2015 - Die internationale Management-Konferenz: Failures and Successes in Processes, Projects, Changes ans Business Analyses |
| 12.06.2015 - 12.06.2015 | 1. Wiener Leadership Kongress - Wieviel Freiheit und Abenteuer stecken in Ihrem Unternehmen? |
| 12.06.2015 - 13.06.2015 | Conference of Tax Treaty Case Law around the Globe 2015 at the Vienna University of Economics and Business |
| 15.06.2015 - 15.06.2015 | österreischische Gesellschaft für innere Medizin (ÖGIM) - Fortbildung, Live, Internet, Print (FLIP): Leber |
| 18.06.2015 - 19.06.2015 | 3rd eHealth Summit Austria 2015 - Gesundheit neu denken: Personalized Health |
| 19.06.2015 - 20.06.2015 | Med Update Europe: Onco Update Europe 2015 |
| 19.06.2015 - 21.06.2015 | The Vienna Conference on Strategy, Organizational Design and Innovation at the University of Vienna |
| 19.06.2015 - 19.06.2015 | 3rd International Symposium of the International Society for Japanese Kampo Medicine (ISIJKM): Traditional Knowledge, Modern Research and Clinical Practice |
| 20.06.2015 - 20.06.2015 | 2. Internationales Symposium der Internationalen Gesellschaft für Japanische Medizin (IGTJM) |
| 22.06.2015 - 24.06.2015 | Conference on Molekular Ecology and Evolution |
| 24.06.2015 - 25.06.2015 | Viral Safety & Raw Materials Congress Vienna 2015 |
| 24.06.2015 - 25.06.2015 | eGovernment Konferenz 2015: eGovernment im föderalen Bundesstaat - Kooperationen für die Zukunft |
| 24.06.2015 - 24.06.2015 | 4. länderübergreifende Konferenz, Deutschland - Österreich - Schweiz - Fürstentum Lichtenstein, zum Thema Open Goverment Data (OGD D-A-CH-LI): Open X |
| 25.06.2015 - 26.06.2015 | 1st Vienna Young Scientists Symposium (VSS) |
| 25.06.2015 - 26.06.2015 | 30th World Summit of the International Federation of Exhibition and Event Service (IFES) 2015 - Core Theme: Sharing Bussines |
| 25.06.2015 - 27.06.2015 | 5th Annual European Political Science Association (EPSA) Conference |
| 25.06.2015 - 27.06.2015 | 2nd International Conference of the Society for Consumer Psychology 2015: Creative Deconstruction |
| 25.06.2015 - 27.06.2015 | The Vienna International Science and Conference Events Associtaion (VISCEA): Conference on Plant Growth, Nutrition & Environment Interaction |
| 29.06.2015 - 01.07.2015 | The Vienna International Science and Conference Events Association (VISCEA): Conference on Plant Abiotic Stress Tolerance III |