Montgomery County Board of Education member Christopher S. Barclay has filed as a candidate in the Democratic primary for the District 5 County Council seat.

Barclay, 53, joins a crowded field seeking the eastern Montgomery seat that had been held by Valerie Ervin (D) until her resignation last month to head a nonprofit organization for low-income families. Silver Spring activist Evan Glass and Jeffrey Thames, founder of the community service nonprofit group Hope Restored, have already filed. Also expected to make their candidacies official before Tuesday’s 9 p.m. deadline are Del. Tom Hucker (D-Montgomery) and Takoma Park activist Terrill North.

Hucker, who announced over the weekend that he would file Monday, hit a snag when officials told him he had to withdraw from the state primary ballot first. He said Tuesday that he will present a notarized form confirming his withdrawal to county election officials in Gaithersburg later Tuesday.

Barclay was appointed to the school board in December 2006 to replace Ervin, who had been elected to the County Council. He was elected in 2008 and reelected in 2012. He said Tuesday that he wants to use his knowledge of county schools and ability “to bring people together” to improve the lives of the system’s parents and children.

“I can do a lot for the schools on the council,” he said.

Barclay was a longtime resident of Takoma Park in District 5 until his divorce last summer. He said he had difficulty finding housing he could afford in District 5 and is currently living with friends in the Randolph Hills section of District 4. He said he plans to move back into District 5 sometime in April or May.

According to a 1990 county attorney’s opinion, state and county laws allow Barclay until the date of the primary election (June 24) to reestablish residency in District 5.