Mayor-elect Bill de Blasio will appoint Carmen Fariña, a former top official of the New York City Education Department, as the next schools chancellor, a person with knowledge of the decision said on Sunday.

Ms. Fariña, 70, is a veteran of the school system, having served as a teacher, principal and district superintendent, and retired as a deputy chancellor in 2006. She met Mr. de Blasio in the late 1990s while he was serving as a school district board member in Brooklyn and emerged as an influential adviser on education during his bid for mayor. Ms. Fariña shares Mr. de Blasio's skepticism of standardized testing and his focus on early education.

Aides to Mr. de Blasio did not respond immediately to a request for comment late Sunday. Reached at her home on Sunday night, Ms. Fariña declined to comment.