The phrase "firm champion" is correct and usable in written English.
You would typically use it to refer to someone who is a strong and committed promoter or supporter of a cause, idea, or organization. For example, "The CEO of the company has been a firm champion of employee rights and benefits since the company was founded."
Still, the mayor of Florence, Matteo Renzi, remains a firm champion of the project.
Ms. Norton has been a firm champion of the view that federal power should be passed down to the states and other interests.
During his presidency Mr. Carter was a firm champion of democracy throughout Latin America, standing up to the military tyrannies that then predominated in the region.
While the Montreal At-Home/Chez Soi projecoulduld rely on the MHCC as a firm champion, it met resistance from the provincial government, which hampered its success.
(During the trial, Kleiner Perkins denied in a statement that Pao was ever discriminated against and insisted that the firm championed women).
King successfully challenged New York City's calculation of its female employees' pensions, which had been based on their longer life expectancy and resulted in lower annual payments to women than men, and at his firm championed the promotion of women.
The 27-lawyer firm champions its history of working on filing big claims, such as class actions alleging price fixing among ocean liners and complaints against Merrill Lynch for hiding subprime loan losses.
Even some who identify as firm champions of human rights in political circles have yet to recognize and accept the rights of members of this community.
On business rates, corporation tax, insurance premium tax and much more, the chancellor is far from being British firms' champion.
Firm-level research supports our assumption, showing that, at large, foreign firms champion ITC proliferation in MENA nations (Gelvanovska et al., 2014; Pick and Sarkar, 2015).
Within the past few days, war has been declared between the two most significant storage companies: mighty EMC and its upstart rival, Network Appliance (known as NetApp .As usual in technological bunfights, the two firms champion different approaches to the same problem.
