I am a current 2nd year master's student who will be applying to PhD programs in the upcoming year. As expected, I need 3 letters of recommendation. Here is the background for my first two letter writers:
1)Master's thesis advisor. Taken a class with this professor and performed well. They have also been my research advisor over the last year and I know will attest great things to my research abilities and the different grants that I have received for our projects.
2) Undergraduate advisor. I took classes with this professor and performed well. I also did very big research which was published, selected for a feature, presented orally at a conference, and they have written other letters of rec for me, which I have had the opportunity to read myself and know that it is a very solid letter attesting to my academic and research abilities.
3) I am considering asking the program administrator of my current master's program. I figured I already have two professors attesting to my research and academic abilities. I have worked closely with this administrator as I have served on various leadership committees amongst the program and have received departmental and school wide awards. I am hoping it would be acceptable to have my third letter not be academic focussed but to give insight regarding my leadership and organizational skills.
Would letter #3 be a mistake? Should I be trying to find someone else? I have heard that it does not look good to have 2/3 of letters coming from undergrad institution, but I have only worked closely in research at my current institution with one person, and the person who I have worked next closest with has been the administrator. Any feedback/ suggestions appreciated.