The phrase "an associate rector at" is correct and usable in written English.
It can be used when referring to a specific position within an organization, typically in an academic or religious context.
Example: "She has been appointed as an associate rector at the university, where she will oversee student affairs."
Alternatives: "a deputy rector at" or "an assistant rector at".
The Rev. Patrick Carroll Ward, an associate rector at the church, performed the ceremony.
The Rev. Paige F. Fisher, an Episcopal priest and an associate rector at the church, led the ceremony.
The Rev. Elizabeth Garnsey, an Episcopal priest and an associate rector at the church, officiated, with the Rev. Alexis Bastidas, a Roman Catholic priest, participating.
Alexa Maria Couch and Andrew Rhett du Pont were married Saturday evening in New York by the Rev. Thomas N. Synan, an Episcopal priest, at the Church of the Heavenly Rest, where he is an associate rector.
The ceremony, at St. James Churchh in New York, was performed by the Rev. William Peyton, an Episcopal priest and an associate rector of the church.
Ten years ago, I was serving as an associate rector in a Philadelphia-area evangelical church, when it came to my attention that a number of Christian men struggled with an addiction to pornography.
The Rev. Nancy W. Hanna, an Episcopal priest and the associate rector at the church, performed the ceremony.
During his illuminating career as an Episcopal priest, Perry served as Rector of St. John's Episcopal Church in Sharon, Pennsylvania, Associate Rector at Christ Church, Cranbrook in Bloomfiled Hills, Michigan and as Rector at Grace Episcopal Church, Orange, New Jersey.
The bride's father, the Rev. Christopher R. Sherrill, who is the associate rector at Trinity Church in Princeton, N.J., assisted in the ceremony.
He has only recently returned to the state, after serving as the associate rector at St. James Churchh, in New York City, for the past seven years; he and Edwards are still only loose acquaintances.
Update (November 6 2017): An earlier version of this article incorrectly stated that Broderick Greer is the associate rector at Grace-St.
