The OMMC acts as an umbrella organization for Canadian museums whose main purpose is the preservation and display of military artifacts.

One of the key projects undertaken by the OMMC was the Inventory of Canadian Military Memorials in Canada, which aimed to identify and record all Canadian military memorials as part of a millennium project.

[2] The OMMC provides various courses, meetings, and other opportunities for its members to address common problems, learn new methods in museological practice, and enhance the historical knowledge of museum staffs.

[3] The OMMC's partners include the Canadian Museums Association (CMA).

The OMMC fosters public awareness and promotes the enjoyment of Canada’s military history.