There are a number of fine Catholic Old Testament scholars.
For an overview of the Old Testament, a standard work in Catholic seminaries and colleges is “Reading the Old Testament: An Introduction” by Fr. Lawrence Boadt, a Paulist priest. Covering both Old and New Testaments is the “New Jerome Biblical Commentary.”
There have been a number of prominent Catholic Old Testament scholars in the past several decades, including Roland Murphy, O.Carm., Joseph Blenkinsopp, Richard Clifford, S.J., Carroll Stuhlmueller, C.P., and many others. Who you would cite for your paper will depend on the part of the Old Testament you are focusing on.