Evergreen Aviation Technologies (EGAT) has announced a management reshuffle with the retirement of chairman Michael Chang and vice chairman JC Liou.

Company president NH Huang succeeds Chang as chairman effective 1 January, EGAT says in a stock exchange disclosure.

Liou has been seconded full-time to EGAT’s manufacturing division in an executive role for the past three years.

Executive vice-presidents, Kris Kuo and Michael Lee have been promoted to president, and will take charge of the MRO aftermarket and parts fabrication, respectively.

Kuo will also take over Chang’s role as the company’s authorised representative.

“To better align EGAT in serving two distinct sets of customer-partners, one being the MRO aftermarket and the other being parts fabrication, EGAT will be segmented into two distinct business units, EGAT MRO and EGAT FAB,” the company says in a press release.

“Each business unit will be headed by a president, each of whom is tasked with driving competitiveness in the respective units.”

EGAT is an MRO joint venture between GE Aviation and Taiwanese carrier EVA Air. It recently announced a NT$1.94 billion ($64.4 million) investment into GE Evergreen Engine Services, a joint venture set up with GE in 2014. This will up its stake from 19.9% to 49%.

This story has been updated with additional information from EGAT and reflects the preferred names of NH Huang, Kris Kuo, and Michael Lee.