"closely overseen" is a correct and usable phrase in written English.
You could use it to describe the supervision of a task or project, for example: "The construction of the new bridge was closely overseen by an experienced team of engineers."
1MDB, or 1Malaysia Development Berhad, was launched by Najib in 2009 and closely overseen by him.
President Barack Obama has defended newly revealed US government phone and internet surveillance programmes, saying they are closely overseen by Congress and the courts.
8 June: US President Barack Obama says the government surveillance programmes strike "the right balance" between security and privacy and are closely overseen by Congress and the courts.
And President Barack Obama said it was closely overseen by Congress and the courts and that his administration had struck "the right balance" between security and privacy.
When the Germans occupied Hungary in March 1944, the Hungarian police, gendarmerie and railway employees played an important role in the rounding up and deportation of Hungary's Jews - closely overseen by the Gestapo.
US President Barack Obama, meanwhile, has defended the Prism monitoring programme, saying it was closely overseen by Congress and the courts and that his administration had struck "the right balance" between security and privacy.
That left Mr. Prince, with his own limited operational experience, in the office of the chairman flanked by two lawyers: Lewis B. Kaden, who was the chief administrative officer and had no prior banking experience, and Mr. Rubin, who is a constant and close adviser but has refrained from closely overseeing lines of business at Citigroup.
The government closely oversees home ownership and real estate transactions.
The department would continue to closely oversee how states manage their worst-performing schools.
All sit on either the Commerce or Judiciary Committees that most closely oversee the media business.
Mr. Trump's infomercial performance suggested he was closely overseeing the Trump Institute.
