I've recently been involved in the following scientific committees:

international, peer-reviewed journals

• JoPP (Journal of Peer Production), as member of the editorial board
• IEEE Software Blog, as associate editor for Free/Open Source Software Engineering topics

international, peer-reviewed conferences and workshops

• OpenSym (International Symposium on Open Collaboration), as member of the program committee
  years: 2016, 2015, 2013
• OSS (International Conference on Open Source Systems)
  as proceedings chair, years: 2017
  as member of the program committee, years: 2017, 2016, 2015
• RelEng (International Workshop on Release Engineering), as member of the program committee
  years: 2016, 2015, 2014, 2013
• SAC WT (track Web Technologies of the ACM Symposium on Applied Computing), as co-chair
  years: 2015, 2014, 2013 2012, 2011
• OSDOC (Workshop Open Source and Design of Communication), as member of the program committee
  years: 2013, 2012
• SAC WT 2010 (track Web Technologies of the ACM Symposium on Applied Computing), as member of the program committee
  
• IWOCE 2009 (International Workshop on Open Component Ecosystems), as publicity chair

national, peer-reviewed conferences and workshops

• CONFSL (Italian Conference on Free/Open Source Software), as member of the program committee
  years: 2016, 2012, 2010, 2009
• SCORE-it 2015 (Italian Student COntest in softwaRe Engineering), as member of the program committee

industry

• Bitergia, as a member of the company's advisory board
• Purism, as a member of the company's advisory board

public sector

• Italian Digital Agency (2013), as member of the working group tasked to define the software acquisition guidelines for the Italian Public Administration (read more)
• Bologna Digital Agenda (2012), as member of the scientific committee

reviews

I've also reviewed scientific papers for a number of international journals and conferences. See my publons profile for a list.