The ASMO has around 100 members, with several prospective military observers joining the association each year.
According to Art. 3 of the ASMO Statutes, the following conditions apply to membership.
1. The ASMO may be joined as a member by:
a) Swiss nationals who, as individuals, have carried out a mission within the framework of military peacebuilding or have completed a corresponding mission training course,
b) Swiss nationals interested in Swiss military peacebuilding.
2. Membership shall be applied for in writing.
3. The Board shall make the final decision on membership. Art. 4 remains reserved.
4. Persons who have rendered outstanding services in the sense of Art. 2, Para. 1 may be appointed honorary members by the General Assembly. Honorary members are exempt from membership fees.