On Friday, First Deputy Economic Development and Trade Minister Sasha Borovik said that he is stepping down, just two months after he entered the Ukrainian government in a bid to deal with a spate of the Cabinet's reforms.
"I have no choice but to leave the government. Today, they have blocked my email and told my team that I will not return," Radio Liberty quoted Borovik as saying on Friday.
A graduate of Harvard University, he had previously worked as a senior executive in Microsoft and in London's office of the American company Akamai Technologies.
Commenting on the situation, Economic Development and Trade Minister Aivaras Abromavicius, for his part, referred to what he described as a personnel-related mistake, something that he said would not prevent his ministry from "moving on."
Former Economic Development and Trade Minister Pavlo Sheremeta tendered his resignation last year, pointing to inability to push ahead with much-needed economic reform.
In a separate development on Friday, Ukraine's parliament dealt with a bill to fire the Healthcare Ministry's Alexander Kvitashvili, a Georgian expatriate, who was granted Ukrainian citizenship last year. The decision on the bill is yet to be announced.
Earlier this year, former Deputy Justice Minister of Georgia Jaba Ebanoidze failed to make it to Ukraine's State Registration Service.
"I was invited to head the State Registration Service. I agreed and took Ukrainian citizenship, but when I came to the Ministry of Justice, the service was abolished," Ebanoidze was quoted as saying.
He said that he sees no political will by the Ukrainian authorities to carry out reforms, which he said can only be fulfilled by piling pressure on the society.
In February 2015, Ukrainian President Petro Poroshenko nominated Saakashvili as his non-staff advisor.