I love museums in part because I love learning. Before my mother became too ill she took my sister and I to the Children’s museum in Houston, Texas. I loved it. I absolutely loved it.
Any teacher with experience in any field (elementary, middle, high school, English, Math, Science, or History) will benefit a musuem because you have the ability to coordinate events, set up displays, and take groups on tour at the museum.
I encourage you to inquire at not only museums but National landmarks that are operating as museums as well. You will find the opportunities bountiful.
Oh yes, here are some resources for museums throughout the United States: USA MUSEUMS or here Accredited Museums