What is Calvin profession after he marries Meg Murry?

Calvin O'Keefe, after marrying Meg Murry in Madeleine L'Engle's "A Wrinkle in Time," does not have a defined profession. The books don't focus on his career path, likely because his focus shifts to becoming a father and supporting Meg's family.

Here's what we know:

* He's a skilled scientist: Calvin displays a deep understanding of science and is often the one to explain complex concepts in the books.

* He's adventurous and fearless: Calvin willingly travels through time and space with Meg, facing danger and challenging situations head-on.

* He's a loving and supportive husband: Calvin is dedicated to Meg and his role as a stepfather to Charles Wallace and a father to their children.

While his profession is never explicitly stated, it's likely he continues to pursue his scientific interests while supporting his family.