"significant challenge faced" is correct and usable in written English
You can use it to refer to a difficult problem or obstacle that has to be solved or overcome. Example: The project's success was in doubt due to the significant challenge faced by the team.
A significant challenge faced by the Chinese team was the inability to communicate directly with the spacecraft.
"A significant challenge faced by chief human resources officers in large, global and complex organizations is the relevancy of research to the critically important business problems we face.
A significant challenge faced by the artificial intelligence methods applied to such flexible wireless communication systems is their dynamic nature, e.g. network topologies that change over time.
In a world dominated by social networks such as Twitter and Facebook, mobile phones that never stop ringing or texting, a significant challenge faced by higher education is to prepare students to cope with information overload.
A significant challenge faced by material developers and product designers is to facilitate the appraisal of bio-plastics as a natural alternative to regular plastics, whilst at the same time meeting users' perceptions of quality.
A significant challenge faced by the mobile application industry is developing and maintaining multiple native variants of mobile applications to support different mobile operating systems, devices and varying application functional requirements.
Predicting species' responses to habitat loss is a significant challenge facing conservation biologists.
This is partly because Mr. Netanyahu believes that the most significant challenge facing Israel is an Iranian nuclear weapon.
A significant challenge facing the child welfare system is the recruitment and retention of a stable and qualified workforce.
Sustainable energy is a significant challenge facing our planet and securing carbon-neutral sources of energy is essential to meeting growing energy demands while addressing environmental concerns.
"Climate change, climate change, climate change". Assistant Professor David Hsu in the Department of Urban Studies and Planning has no hesitation naming what he considers the most significant challenge facing urban planners today.
