The document discusses the experiences of Una Nowling, a transgender woman who transitioned while working as an engineer, and her coworker Ari Copeland, a transgender man. Some of the key differences they experienced in crossing the gender divide included facing more scrutiny of their appearance and having to constantly prove their competence as engineers. Both experienced discrimination and disrespect from clients due to their gender transitions. However, their employer Black & Veatch was supportive of their transitions.