What is another word for is active with?
Pronunciation: [ɪz ˈaktɪv wɪð] (IPA) 
If you want to convey the idea that someone is actively involved in something, there are many synonyms for the phrase "is active with." Some possible options include "participates actively," "engages fervently with," "is deeply involved in," "is actively committed to," "is energetically engaged with," "is solidly invested in," "is vigorously committed to," "is thoroughly engrossed in," and "is strongly focused on." These alternatives can help add variety and nuance to your writing, and they offer different shades of meaning that may better fit the specific context in which you are using the phrase.
