Can a Practicing Catholic Officiate at a Civil Wedding Ceremony?

Assuming that the couple are either non-Catholics not bound by Catholic marital law, that there are no obvious impediments to their marriage (e.g., previous marriage, close blood relationship), and that the Catholic is authorized by the state to officiate at civil wedding ceremonies (e.g., judge, justice of the peace, other recognized official), yes, a Catholic could preside at a civil wedding ceremony. The only caveat would be that a Catholic could not obtain “ordination” from a mail-order or online “ordination” mill, even if his state recognizes marriages performed by individuals who have obtained such “ordinations.”