I am applying for tenure track faculty jobs and postdocs. I am setting up my letters of recommendation and I am struggling on who I should ask. I have one strong letter from my advisor, one decent letter from a professor but I am stuck on who I should ask for the third letter. I think I have three options
Person A is someone I worked with recently and the work I did for them funded my PhD. They are not a professor and do not have a PhD. This job involved a lot of practical work and could have led to some publications in journals (think higher ed research, while my phd is in statistics). But it ultimately did not - we did have some conference presentations.
Person B is my Master's advisor from four years ago. They are a tenured professor- and could speak well of my work from four years ago.
Person C is another professor from my department but I don't think their letter will say a whole lot.
From the link below it seems like person B would be a better choice as they are tenured and familiar with research I have done. I have asked person A for a letter, and they unexpectedly sent it to me. While it was very complimentary - it seemed better suited for an industry job rather than an academic job.