The phrase "as a vigorous proponent of" is correct and usable in written English.
You can use it when expressing strong support or advocacy for a particular idea, cause, or policy.
Example: "As a vigorous proponent of renewable energy, she actively campaigns for sustainable practices in her community."
Alternatives: "as a strong advocate for" or "as an ardent supporter of".
Mr. Trump has said he will choose as his nominee for attorney general Senator Jeff Sessions, Republican of Alabama, a vigorous proponent of strong immigration enforcement.
For years she has been a vigorous proponent of reform in health, education and child care, but always as an unelected advocate.
A vigorous proponent of private enterprise and free trade, he signed trade treaties with England (1860), Belgium (1861), and Italy (1863).
George Marshall, a vigorous proponent of civil rights and a conservationist with a special passion for the Adirondack Mountains, died in Nyack, N.Y., on May 21.
In the 1920s, Mr. Corbett became a vigorous proponent of the skyscraper age, predicting that elevated sidewalks, urban airfields and subterranean rail lines would solve congestion problems.
The works of David Henry Hwang, the most prominent Asian American dramatist of the 20th century, are not limited to Asian concerns, but he was a vigorous proponent of the Asian American theatre movement.
Ros-Lehtinen has been a vigorous proponent of recognition of the MEK, flying around the country to speak in support of unbanning the group and pressing the issue among fellow members of Congress.
They hope that he will be a vigorous proponent of civil rights and social programs.
Even Salazar, a vigorous proponent of wind power and solar power development, suggests that gas -- and fracking -- are here to stay.
Mr. Domenici is perhaps the Senate's most vigorous proponent of nuclear power and, as a new shepherd for any energy bill, will have priorities that include building support for that industry.
