The phrase "an important player in the development" is correct and usable in written English.
You can use it when discussing someone's significant role or contribution in a particular process or project.
Example: "The company has been an important player in the development of renewable energy technologies."
Alternatives: "a key contributor to the development" or "a significant participant in the development".
have identified a CD146-expressing precursor as an important player in the development of the renal vasculature.
As a scion of one of America's most powerful families, a globetrotting business statesman, a former C.E.O. of Chase Bank, and an important player in the development of downtown Manhattan, David Rockefeller is an emblematic figure of a world that no longer really exists: the world of the Wasp ascendancy.
During the administration's "energy week," Energy Secretary Rick Perry said that "this administration believes that nuclear energy development can be a game-changer and an important player in the development of our clean-energy portfolio globally". Yet the Trump budget proposal would slash nuclear research and development.
These observations from animal models and human suggest A-FABP may be an important player in the development of CAD.
These data clearly demonstrated that AcNOS could be an important player in the development of refractory nature of the mosquito and need to be explored further.
Wnt has been proposed as an important player in the development of effector T-cells and in the activation of the regulatory T-cell [38].
The industrial sector is an important player in the global sustainable development agenda.
This expression pattern is in favor of the hypothesis that CLC is an important player in the signal triggered by the CNTF receptor and that is required for motoneuron development.
The pathophysiology underlying the development of these glucose metabolic alterations is multifactorial; however an alteration in the balance between insulin sensitivity and insulin secretion represents the most important player in the development of type 2 diabetes.
