Prioritize information from credible sites like the theologian's personal website/LinkedIn, their university's website, sites containing works authored by the theologian (e.g. columns/pieces in periodicals like America: The Jesuit Review and the National Catholic Reporter; self-published thoughts on platforms like their Twitter page or blogs), and other professional organizations that the theologian might belong to and be active in.
You need to consult the actual materials authored by your theologian to be able to communicate the core of their research output. You will use the SCU Library's resources for this.
OSCAR is the Library's catalog and it tells you the books the SCU Library owns or subscribes to (physical and virtual), in addition to many other material types. You can use it to find books authored by your theologian, and books containing chapters written by your theologian but authored by someone else.
Look for the button in OSCAR to see if another Library has books by your theologian. Below is the direct link to Link+
Use the InterLibrary Loan service to request materials not available at SCU or through Link+. Articles can come very quickly--within hours--but physical media like books take longer to be mailed.
If looking for articles by your theologian, make sure to use Last name, First name and choose author from the drop down menu.