Environmental and sustainability education is a widespread concept nowadays, with several frameworks and competencies supporting it, such as normative learning and forest schools. However, not all of these frameworks are as accessible for every teacher, since they tend to be based on a certain approach the school has to take as a whole, or personal knowledge of the teacher that might not have been acquired yet. This qualitative study focuses on the perception of museum employees on environmental history, with the aim of providing information to history teachers on how museums can help in taking the first steps towards the integration of sustainability education in history. Eight different museum employees from two different countries were interviewed about their perceptions on history and sustainability education –also known as environmental history. The results clearly showed that sustainability and environmental history are active components in current museum education, although the intensity and perceptions of it varied. Answers from the participants showed a clear awareness, both for the topic as for potential improvements. Challenges and obstacles that were found mainly consisted of resources, people, and time. The aforementioned findings contribute to the limited understanding that currently exists on sustainability education at museums. Additional research is required in order to create a more enhanced view of how museum visits can be implemented in sustainability education.