Plenary participates in the development of the broader infrastructure market and public private partnership (PPP) industry, contributing to infrastructure policy debates and making regular submissions to parliamentary inquiries at state and federal level.

This includes submissions to reviews and inquiries undertaken by the Australian Government's independent infrastructure authority, Infrastructure Australia.

Plenary is a contributing member of Infrastructure Partnerships Australia (IPA) at board level and contributes to IPA's portfolio-based activity as a member of the Social Infrastructure, Water and Public Affairs taskforces.

Plenary is an active and contributing member of the International Project Finance Association, Committee for Melbourne, Committee for Sydney, and the Committee for Economic Development of Australia.