I work in Sports Management so I would contend that if there is a specific role or department in an organization to contact it would be their Community Outreach Dept. If the company website does mention their presence in the community that would be the direction to. I would also look at the PR dept in the company. Finally I would also do my homework on the company leadership, whether its a board, consortium, a CEO or President. Research their philanthropy if they have done any at all and if not this may be your opening. I would also brush up on the companies current presence in the community as angle to possible get them involved in the community.