The phrase "a major organization" is correct and usable in written English.
It can be used to refer to a significant or influential entity, typically in a professional or formal context.
Example: "The conference was attended by representatives from a major organization in the tech industry."
Alternatives: "a leading organization" or "a prominent organization".
I was the face and the voice of a major organization.
But a glitch on a network that controls critical systems at a major organization can be massively disruptive.
"Like every CEO of a major organization, I am responsible for what happens at the Department of Justice.
So if he's a serious astrophysicist, he hasn't published papers or appeared at conferences before, and isn't part of a major organization.
The Hampton Roads Partnership, a major organization of business, political and other civic leaders, would much rather spend money first on other projects that it thinks would have more impact.
The number of courses dropped to 51,116 in 2012 from 70,052 in 2006, according to the report, which was released last month and compiled using admission data by the University and College Union, a major organization of college and university professors, lecturers and academic staff.
Yet, IT was also being tapped for a major organization-wide undertaking to integrate our United Kingdom and European systems and processes into a single global system.
This is turning out to be well utilized and has now over a dozen major organization populating this information.
Not a single major organization representing patients, physicians, hospitals or others who work in the nation's healthcare system backs the GOP's Obamacare strategy.
"I can't remember something that had this much disinformation that was actively being promoted by an administration and a major news organization together," said Oliver.
The Royal Netherlands Embassy told me there are a few major organizations that fund collaborative U.S.-Netherlands research programs.
