with Jens-Peter Kreiß (https://www.tu-braunschweig.de/en/stochastik/team/kreiss) 

Springer (https://link.springer.com/journal/184)                              

• Communications in Statistics: Theory & Methods (since 2007).
  
• Communications in Statistics: Simulation & Computation (since 2007).
• Communications in Statistics: Case Studies & Data Analysis (since 2016).
• Statistical Modelling (since 2019)
• Applied Stochastic Models in Business and Industry (since 2021)
  

• Member of American Statistical Association
  
• Member of the International Psychometric Society
• Member of the Greek Statistical Institute.
• Elected member of the Council of the Greek Statistical Institute for the period 2006-2007.

Member of the local organizing committee of the conferences:

• EMR-IBS 2005: 3rd EMR-IBS International Conference, 10-12 May 2005, Corfu.
• IME2007: 11th International Congress on INSURANCE: MATHEMATICS & ECONOMICS, 10-12 July 2007, Piraeus.
• EMS 2010: 28th European Meeting of Statisticians, 17-21 August 2010, Piraeus
• CCDA 2018: Challenges for Categorical Data Analysis (CCDA 2018)