"a key facilitator" is correct and usable in written English.
You can use it to refer to someone or something that helps to make a process or activity easier or more successful. For example: "The CEO acted as a key facilitator to help the two companies reach an agreement."
A key facilitator of the deal has been Mr. Brown, a lobbyist who once negotiated with Indian tribes on behalf of former Governor Cuomo's administration.
Allegedly the main intermediary between the hijackers and al-Qaida leaders, he has been described by officials as a "key facilitator" as well as a "lead operative" in a plan to crash hijacked airliners at Heathrow airport.
Another alleged al-Qaida member Ramzi Bin al-Shibh, described as a "key facilitator" in 9/11, was said to have been a "lead operative" in the UK plan, which the US said was disrupted in 2003.
China is the largest foreign holder of US treasury securities, a major trade partner for the US, Europe, Latin America, and Australia, and a key facilitator of intra-Asian trade, owing partly to the scale of its processing trade.
Last December, the European Union identified him as a "key facilitator of Iranian oil deals" and forbade European Union companies or individuals to do Iran-related business with him.
The report points to "the rapidly growing emergence of the Internet as a key facilitator for criminal activity," and not just in areas like cybercrime, credit-card fraud, distribution of pornography and audiovisual piracy.
PARP1 is a known key facilitator of DNA repair and is implicated in pathways of carcinogenesis.
But the story it tells is damning: a scheme existed with no economic logic other than to facilitate capital flight from Russia; the users of that scheme moved their money in a clandestine fashion; the key facilitator of that scheme, an American citizen, took bribes from clients to keep the gravy flowing.
Looking at any industry where we make big purchase decisions that involve the trade of information — buying a home, car, plane ticket — the Internet has become the key facilitator.
The Internet of Things (IoT) is the key facilitator for digital manufacturing (Industry 4.0, Cyber-physical Systems), as well as for smart, intelligent products, services and processes.
"We are committed to developing a framework for green national accounts that we can implement by 2015, and we are confident that the 'Teeb for India' study will be the key facilitator," he said.
