Businesses have used alliances to share knowledge and resources amongst themselves to achieve corporate goals, yet little is written in the literature on how non-profit organizations manage alliances and what makes these alliances effective. This paper examines how Australian environmental non-governmental agencies (NGOs) perceive their alliances with other NGOs, profit-based organizations and governmental partners. To a large extent this paper replicates the work of Milne, Iyer and Gooding-Williams (1996) and includes measures of alliance effectiveness developed by Bucklin and Sengupta (1993). The findings suggest that Australian environmental NGOs use varying mechanisms to manage these alliance relationships, which is generally supported in the existing literature.