"proactively cooperate" is a correct and usable phrase in written English.
You can use it to describe an action of working together in a proactive and cooperative manner. For example, "The two departments proactively cooperated to achieve the project's goals."
Calling the recent allegations involving phone hacking and paying off the police "deplorable and unacceptable," Mr. Murdoch pledged that the company would "fully and proactively cooperate with the police in all investigations".
The company's cooperation with the police investigation was part of its commitment, the statement said, "to undertake a review of all News International titles, regardless of cost, and to proactively cooperate with law enforcement and other authorities if potentially relevant information arose at those titles".
External resources are encouraged to proactively cooperate with manufacturing enterprises to better satisfy end users' demands.
The investigation has also revealed that SMSGlobal said it "proactively" cooperates with UAE intelligence agencies, and has pointed to help it has given the FBI and the Australian federal police.
If the different stakeholders do not cooperate proactively, a development with lesser environment risks could become greater risks for the people handling new types of vehicles emerging from the rapid technical development of the car industry.
"We maintain open channels of communications, cooperating proactively with the authorities to help answer their questions on our local operations," the release said.
"I am not allowed to mention names of people we work with, nor any specific cases for operational matters which I have signed an agreement paper with these agencies … I cannot divulge any more information than that SMSGlobal fully cooperates, proactively in helping UAE intelligence, as we notice trends and report them to authorities before they become aware themselves".
Sudan decided to cooperate.
