Siddiqi has been involved with the BCS Formal Aspects of Computing Science (FACS) Specialist Group for many years.
[3] TMG works with all sections of the black and Asian communities to that are facing hostility, abuse and violence from racists.
He has been involved in a number of cases acting as a union representative or advocate for individuals against various public and private sector organisations.
In April 2006, Siddiqi successfully defended Professor Richard Bornat of Middlesex University in a hearing concerning his suspension due to controversial emails.
Siddiqi has a strong interest in mediation, arbitration and conflict resolution and in various fields but particularly higher education and information technology and is a member of Improving Dispute Resolution Advisory Service (IDRAS) for Higher and Further Education, UK.