From the Western Pennsylvania Conservancy:
Do you know a college student who would love to have an exciting, educational summer internship at the Conservancy or Fallingwater? A variety of internship positions are available, including in the areas of invasive plant biology, preservation, collections, landscaping, digital multimedia and education. These full-time internships are paid; Fallingwater interns work onsite and also receive free housing. Students should apply soon!
From the National Park Service:
We expect to hire 1-2 seasonal (NTE 1039 hour) Biological Science Technicians to assist with long-term forest health monitoring in the NCR (National Capital Area) parks. Anticipated start date is late April.
Applications deadlines vary - please check sooner rather than later.