Letters of rec - No supervisor?

[wanderlust_0]

Hello,

I'm planning on applying to MPP programs this year, and I am unsure of who to ask for my third letter of rec. As some background, I graduated two years ago and have been working for about a year and a half at the same company.

So far, I have asked:

1. Econ professor from undergrad

2. Associate at my current job

3. ?

For the third recommendation, I am considering asking another associate at my company, but am afraid that asking two people of the same title (and no managers/people higher up) would reflect poorly. I think the associate knows me better than any of the managers, though, so I am more inclined to say it would be a more enthusiastic letter. I am not particularly close nor have I worked very closely with most managers.

Another consideration is the degree of the letter writer. The associate I would ask does not have a degree in public policy - how much does this matter?

Thanks in advance for any advice!