Jenica Brown guided Loudoun County to six state championships over the last seven seasons and a 222-11 record over the last eight years. (John McDonnell/The Washington Post)

After 12 seasons, six state championships and the construction of one of the most dominant volleyball powerhouses in Virginia High School League history, Loudoun County Coach Jenica Brown has resigned.

Brown and her younger brother Jarod — the Raiders’ assistant coach — informed the girls’ team of their decision Thursday at Loudoun County after they were honored for being MaxPreps’ No. 18 in team the nation and MaxPreps’ 12th-ranked team in the Xcellent 25 presented by the National Guard in a school-wide assembly.

Brown noted the need to spend more time with her 4-year-old son Brady and her interest in having another child as reasons for resigning.

“We were a little shocked actually that she was going to do it. We thought she may [resign] because she talked about it previously,” All-Met libero Kelsey Slack said. “Most of the seniors were teary-eyed because if we come to visit she’s not going to be there.”

Slack was a part of a Raiders (30-0) 2013 4A state championship team that Brown has regarded as the best in her 12-year tenure. They were the wire-to-wire No. 1 team in The Washington Post.

Brown took over the program in 2004 and quickly transformed a middling squad into one of the area’s best. Over the past eight years, the Raiders compiled a 222-11 record that included eight district and region titles and six state championships in the past seven years. Brown was named The Post’s All-Met Coach of the Year in 2006 and 2010.

“I’m going to miss the girls, they’re one of the few people that can relax me because they’re so goofy, silly and free-spirited,” Brown said. “It was so much fun teaching them and being able to see them make connection of what we taught them.

For Brown, this will be her first time away from the sport since 1995. She will continue to commute from West Virginia to teach physical education at Sycolin Creek Elementary School in Leesburg.

Jarod, who has been on staff as an assistant since 2006, served as interim coach in 2009, earning state coach of the year honors that season.

Brown has sent 25 players on to college to play volleyball and used meticulous scouting and a focus on developing players at the middle school level to establish the Raiders as a regional force.

The Raiders finished no worse than second in The Post’s season-ending rankings dating back to 2007.

“I’m still going to go to the games. I definitely want the girls to have the relationships we’ve had and bring special things to the new coach,” Brown said. “I hope they are adaptable and I’m praying the best person wants to step up. [Loudoun County] is a great place with a great athletic director that can lead anyone in the right direction.”