The Randolph School Committee has decided to replace outgoing Superintendent Oscar Santos with its only internal applicant for the job, who would fill the position for a yet-to-be-determined length of time.

Committee members took turns interviewing Steven Moore, who has been a district administrator since 2006, for more than an hour last Thursday night, focusing on his plans to continue improving the district’s state rating after Santos leaves at the end of June. The public school system, which has nearly 3,000 students, must improve measurably or risk going into state receivership. Moore was given the job with a 6-1 vote.