- Member of the Lighting Design Research Group of Aalborg University Copenhagen (https://www.light.aau.dk/Lighting+Design+Research+Group/)
- Workshop, Tutorial & Exhibition co-Chair at the 12th International Conference on Computer Vision Systems (ICVS 2019) in Thessaloniki, Greece, 23-25 September 2019
- Invited speaker at the Lighting Design Forum at Singapore, August 2018 (http://lightingdesignforum.com/)
- General Chair of “3DTV CΟΝ 2017”, Copenhagen, 7-9 June 2017 (www.3dtv-con.org). 3DTV-CON 2017 was organised by the Architecture, Design & Media Technology Department of Aalborg University Copenhagen and was technically co-sponsored by IEEE Danish section, IEEE Greek CAS/SSC Joint Chapter and IEEE Finnish SP/CAS Joint Chapter
- Co-organizer of the workshop “Storytelling Lighting Design” within the Interactive Digital Storytelling Conference, Copenhagen, Dec. 2015
- Attended the University Pedagogy course for Assistant Professors (Adjunktpædagogikum) at Aalborg University (2013-2014).
- Scientific organizer and lecturer of the Erasmus Intensive Program with the title Computer Vision and Intelligent Computer Systems, organized in Brno, June/July 2013, (http://www.fit.vutbr.cz/events/ip2013).
- Co-Organizer of the special session “Digital Signal Processing and Systems for Audio, Haptic and Visual Applications” at the 18th International Conference on Digital Signal Processing, 1-3 July 2013, Santorini, Greece.
- General chair of 13th IASTED International Conference on Computer Graphics and Imaging, June 18-20, 2012, Aldemar Knossos Royal Village, Heraklion.
- Member of the Steering Committee of the conference: International Conference in Central Europe on Computer Graphics, Visualization and Computer Vision, Plzen, Czech Republic.
- Member of the Editorial Advisory Board of Journal of WSCG, Hardcopy – ISSN 1213-6972, CD ROM – ISSN 1213-6980, On-line – ISSN 1213-6964.
- Publicity chair of 7th International Conference “New Horizons in Industry, Business and Education” (NHIBE 2011) 25-26 August 2011, Chios Island, Greece.
- Editorial board member at 3D Research Journal of Springer Publishing, http://www.springer.com/engineering/signals/journal/13319?detailsPage=editorialBoard
- Guest Editor of the Topical Issue on 3DTV in 3D Research Journal of Springer Publishing, G.A. Triantafyllidis (editor) Topical Issue on 3DTV, Journal on 3D Research, Springer, 3D Res. Vol. 3, No. 1, 2012.
- Publicity chair and member of the steering committee of the international conferences 3DTV CON 2008, 3DTV CON 2009, 3DTV CON 2010 and 3DTV CON 2011.
- Guest Editor of the Special Issue on Advances in 3DTV broadcasting, in International Journal of Digital Multimedia Broadcasting, Hindawi Press: Zabulis, N. Grammalidis and G. Triantafyllidis (editors), Special Issue on Advances in 3DTV broadcasting, International Journal of Digital Multimedia Broadcasting, Hindawi Press, vol. 2010, Article ID 579514, 2010.
- Guest Editor of the Special issue on 3DTV: Capture, Transmission and Display of 3D Video in EURASIP Journal on Advances in Signal Processing: A. Triantafyllidis, A. Enis Cetin, Aljoscha Smolic, Levent Onural, Thomas Sikora, and John Watson (editors), Special Issue on 3DTV: Capture, Transmission, and Display of 3D Video, EURASIP Journal on Advances in Signal Processing, vol. 2009, Article ID 585216, 2009.
- General Chair of “3DTV CΟΝ 2007”, Kos Island, 7-9 May 2007 (www.3dtv-con.org). 3DTV CON 2007 was organized by the 3DTV Network of Excellence and ITI-CERTH, and was supported by the IEEE, EURASIP and MPEG-IF
- Local Arrangements Chair of the second international conference of “3D Data Processing Visualization and Transmission” (3DPVT 2004), Thessaloniki, 6-9 Sept
- Reviewer of several IEEE conferences (ICIP, ICASSP, ISCAS etc) and journals (IEEE Trans on Circuits and Systems for Video Technology, IEEE Trans on Circuits and Systems I, IEE Proc Vision, Image and Signal Processing, IEE Electronics Letters, EURASIP Journal on Applied Signal Processing, etc).