Join Us. Do work that matters! MobilizeGreen seeks a 36-week Visitor Service Specialist Intern to work on the John Heinz National Wildlife Refuge at Tinicum. This intern will work on a variety of outreach and environmental education programs including: prepare and present on-and off-site environmental education programs for a variety of audiences, develop and present interpretive programs like orientations and guided hikes for public audiences or school groups, learn to teach youth outdoor skills like fishing, archery, and kayaking, use verbal and written communication to engage the local community, develop or revise environmental education and interpretive materials, brochures, web content, exhibits and signs, draft a variety of written materials including news releases, articles, corr