Houthi rebels have appointed Naif Al-Ahmad Ganis, vice president of the revolutionary committee, as Yemen's new ambassador to the Syrian regime, said SABA news agency, which is in the control of the rebels.
There was no immediate comment from the militant group and Yemeni presidency.
Iranian-backed Houthis have been battling the Saudi-led coalition since March 2015.
As a result of Houthi aggression, Yemeni President Abd Rabbuh Mansour Hadi had to temporarily flee to the Saudi capital Riyadh and formally request help from Arab states to save Yemen from the Houthi militants.
Meanwhile, Gulf Arab countries and the US have accused Iran of assisting the Houthi militants financially and militarily.
According to Yemen Ministry of Public Health, at least 7,000 people, including 1600 children, have been killed in the ongoing civil war in Yemen, nearly half of them civilians and more than 16,500 have been injured since March 2015.