Optima founder, Cornel Ung, will resume day-to-day management of the company following the resignation of managing director, Douglas Wong.
His departure is one in a series of staff exits this month.
Wong was promoted to the MD role in July after Ung decided to step back from the business to take on an executive chairman role. He had previously been a non-executive director and advisor for the computer manufacturer.
Speaking to ARN on Wong's departure, Ung said he would look to hire another managing director in the long term, but would take the role back for the next three months.
"Some of our division areas have been restructured so I want to make sure we have the right processes in place first," he said. "We all have different opinions: I don't want the new person to come in and make changes again. We want to ensure the team is stabilised."
Ung said Wong was leaving to pursue external interests.
Optima CFO and company secretary, Justin Taylor, who was posted to the job after Pipvide Tang's exit in April, has also resigned from the company.
Optima said Edmond Chan would now take on the CFO position, while Tang will be reinstated as company secretary and non-executive director. Chan had been a director of Optima until August this year.
Optima's channel manager, Michael Calculli, has announced he is also leaving after a 12-month stint.
Calculli said he had been appointed the new sales manager for Australia and New Zealand at Lexar, to market its range of digital media products. His last day at Optima will be December 3.
"I believe I am leaving Optima's channel business in a better position now than when I commenced in the role 12 months ago," he said.
Calculli cited 27 per cent growth in channel revenue in the past financial year, as well as a boost to its active business partners, as examples of his achievements.
Ung said Optima had an internal staff member in mind for the channel position, and would be initiating a changeover in coming weeks.
Meanwhile, the company has also created a new sales and marketing director's position, to be filled by ex-Nortel marketing director, Charles Yan. He previously held positions at Compaq and Digital in various service-related roles.
Ung said Yan's experience would help Optima break into the services market.
"Services is an area we can continue to offer our existing customers," he said.
"The education and government markets are looking for extra value from hardware vendors. With the ongoing management of the PC for example - we will try to build up services programs to manage this."
Ung said the PC manufacturer would look to introduce specific services programs early next year.