Anticipating that capital punishment could soon be used again, the prison service is hurrying to recruit two executioners.
"We never know if the government will resume the death penalty, but we want to hire two hangmen to fill vacancies and be ready if the government wants to execute drug traffickers," Thushara Upuldeniya, a spokesman for the prison service, told Reuters.
An advertisement published in the state-run Daily News on Monday put the monthly pay at 36,310 rupees ($203.99), which would be above average for a government job.
Candidates should be Sri Lankan, male, aged between 18 and 45, and have both "excellent moral character" and "mental strength".
Upuldeniya said the job interviews will be conducted next month.
At least 25 people convicted for drugs offences, including two drug dealers, could be executed, Upuldeniya said.
There were also 436 people including six women on death row for various crimes including murder, he said.
Government officials told Reuters that Sirisena has sought advice from the Philippines on how to combat drug trafficking, amid mounting concerns that Sri Lanka could become a transit hub for the narcotics trade in Asia.
Police have arrested more than 50 people since the middle of last year after busting a drug smuggling ring last year. ($1 = 178.0000 Sri Lankan rupees)