The MHF held its management committee meeting in Penang on Sunday, in conjunction with the USM Penang-International Sixes and Sevens, but could not reach a concrete decision.
"We only had a brief discussion because National Sports Council (NSC) director general Datuk Zolkeples Embong could not make it for the meeting.
"The MHF is still keen to hire a foreign coach but until we do so, Tai Beng Hai remains as the interim coach," said MHF secretary Hashim Yusoff.
Hashim said the MHF has short-listed three coaches, and the coaching committee has been told to submit its recommendations.
"I know that it has been a year that Beng Hai has been an interim coach, but I believe we should be able to get a reply from the coaches that we have contacted by the end of this year."
Oltmans has a contract with clubside Larens until 2012, and the MHF will have to pay a lot to secure his release, and then pay him and his assistant at least E16,000 (RM80,000) per month.
With Malaysia involved in the Asian Champions Trophy, the Azlan Shah Cup, Asian Games and Commonwealth Games next year, the MHF is keen to get a foreign coach fast.