"primarily in charge of" is a correct and usable phrase in written English.
You can use it to describe a person who is primarily responsible for the management or supervision of a certain task, job, or activity. For example: "John is primarily in charge of managing the office budget."
It means that they, not I, are primarily in charge of how they look.
He added that Mullah Dadullah "was a military leader, primarily in charge of the effort to recapture the city of Kandahar," once the Taliban's stronghold.
The former official said the agencies primarily in charge of border security, Customs and Border Protection and Immigration and Customs Enforcement, were "ringing alarm bells" within the administration.
John Peacock, the coach, departed for a first-team position at Derby County in June, leaving Dewsnip – who is primarily in charge of the Under-18s – to take over the squad.
Current Role at StanfordGlynn is the Assistant Director in the Department of Special Collections & University Archives is primarily in charge of the Collection Services Division and the libraries' Born- and Acquired-Digital Programs.
Mr. Schmidt came up with Ms. Palin's name, and two other McCain campaign advisers — Rick Davis, the campaign manager, and A. B. Culvahouse Jr., a lawyer — were primarily in charge of checking her credentials in the space of a week.
This RA may participate in research activities as desired, but he or she would primarily be in charge of various technological aspects of BASC.
That is why Vice President Biden, not a lower-level administration official, is running stimulus oversight: so far, he has primarily been in charge of damage control, not coordinating stimulus spending among agencies.
Although windows let in a little sunlight, you'll primarily be in charge of giving your plants light through artificial means.
Radiologists and nuclear physicians are primarily responsible and in charge of performing all imaging procedures.
To benchmark one's unit in relation to other stroke units in the NQR contributed to quality improvement; primarily the RNs in charge of registration, but also the physician in charge of Riks-Stroke in the unit, used the NQR to identify units with superior stroke outcomes and contacted and learned from them.
