The phrase "after officially" is correct and usable in written English.
It can be used to indicate that something occurs following an official action or announcement.
Example: "After officially announcing the merger, the company held a press conference to address any questions."
Alternatives: "subsequent to the official" or "following the official".
After officially committing on April 17, I attended Harvard's Visitas weekend from April 20 to 23.
After officially retiring in 1978, he remained active at the museum and continued to publish articles.
After officially surrendering Saigon, Minh was placed in detention, but he was allowed to emigrate in 1983.
The Netherlands regained sovereignty of western New Guinea at the end of the war and retained it after officially recognizing Indonesia's independence in 1949.
Many Muslims find their movements restricted unless they pay hefty bribes; others languish in detention after officially instigated clashes with Buddhists.
On Wednesday the Holy See announced that it was preparing to sign its first treaty with Palestine, two years after officially recognising it as a state.
Just minutes after officially stepping down as party leader, Mr Jiang was re-elected to head China's powerful military commission that oversees the People's Liberation Army.
One day after officially launching his presidential bid, Bush took on Barack Obama over the Islamic State, the pope over climate change and even his brother.
After officially retiring at 75, he had asked to remain in the parish and continue to help when necessary, the archdiocese of Rouen said.
Moments after officially nominating Mary Schapiro to run the Securities and Exchange Commission SECC), America's main markets watchdog, on Thursday December 18th, Barack Obama, America's president-elect, launched a metaphor-mixing tirade against the country's dysfunctional system of financial regulation.
And now, the First Church of Cannabis is about to have its first meeting after officially being made a charitable organisation in Indiana having circumvented the state's laws which prohibit marijuana.
