this is quite close to my boss's experience. he was an ecology major and phd in geography. i think you probably have about twice the software experience he had before merging the two
his application is quite simple and repeatable: optimizing field measurements through apps. or more simply, really good forms and reports. we focus on forestry but have been able to repeatedly repackage and adjust our software for clients who need to go someplace, fill out a form, and then report on that later and/or submit it to some unique system (etl stuff)
a phd proves you mastered a language and knowledge of process applicable to communicating with subject matter experts. youre certified in the scientific method. even when my boss doesnt have direct experience in a specific field, he can make an analogy to other client or phd work. clients are confident you can meet with members across their team to plan, implement, and test software to optimize their workflow without much hand holding
another thing: he does a lot of talks. after a few talks now he's asked all the time and one of ESRI's first calls for an alternate at conferences. a lot of this is the phd title. if you dont loathe public speaking too much than this can open doors to conversations with clients, professional partners, or institutions developing new tech