An operator of brothels in the suburbs of Boston and Washington D.C. was sentenced to a year in federal prison, which is a quarter the sentence leader Han “Hanna” Lee got earlier this year.

Junmyung Lee worked as the “booker” for clients and the sex workers of the operation. Details included in law enforcement affidavits also describe his work as kind of an errand boy for the Madame.

“Junmyung is also organized and dependable — he arranged logistics, instructed the men to be discrete to avoid the attention of neighbors, collected profits from the brothel locations regularly, and transported and assisted the women upon their arrivals to and departures from the Boston-area brothels,” prosecutor Lindsey Weinstein wrote in her sentencing memo.

He pleaded guilty to his role last October and on Friday U.S. District Judge Julia E. Kobick sentenced him to 12 months in prison to be followed by a year of supervised release. His boss, Han Lee, was sentenced to four years in prison in March.

Han Lee’s brothel network took in at least $5.6 million from at least 9,450 commercial sex acts with the Korean sex workers, according to the sentencing memo.

Of the thousands of men who frequented the Boston-area services, the cases of more than 30 of them were heard in court in Cambridge over the course of three hearings last month — though only two of them showed up in person. Each was found to have probable cause for a criminal complaint to be issued. Arraignments have yet to be scheduled.

Junmyung Lee’s fluency in English — something Han Lee does not possess — and other traits, Weinstein wrote, “made him a good employee for Han and allowed him to personally profit royally off of women selling their bodies for sex to complete strangers thousands of times.” She estimated his salary as $6,000 to $8,000 a month.

A third operator, James Lee, pleaded guilty to his role in February. Prosecutors say that he forged identities to rent the apartments where the brothels operated, including some in Cambridge and Watertown. He’s scheduled to be sentenced on April 29. Prosecutors say the three are not related.

Han Lee maintained at her own sentencing that she did not force the women to be prostitutes. She said, through a Korean interpreter, that she had herself been a sex worker when she first came to America and that she worked hard to make the lives of these women much better than is usual for prostitutes.

It’s a contention Weinstein has vehemently disagreed with throughout the case, and she reiterated the government’s stance in Junmyung Lee’s sentencing memo.

“While the government believes that the women engaged in sex acts under the legal standard of ‘voluntarily,’ they were vulnerable women who were exploited by the organization,” she wrote. “The Government also asserts that while the women were not ‘forced’ to engage in commercial sex, as defined by federal law, of course this was not their choice. To have a price set for one’s body and to engage in repetitive sex acts with strangers is a choice for those with limited or no other choices.”