Prince Harry will become the first chief impact officer of BetterUp Inc, a San Francisco-based firm that provides employee coaching and mental health assistance, the company said on Tuesday.

The move comes about a month after Buckingham Palace announced Harry, Queen Elizabeth II's grandson, and his American wife Meghan had made a final split with the Royal Family, and would not be returning as working members and would lose their patronages.

Earlier this month, the couple featured on Oprah Winfrey's television interview, in which Meghan accused the Royal Family of racism and Harry claimed they had cut him and his wife off financially.

In his new role at BetterUp, Harry will focus on driving advocacy and awareness for mental fitness, diversify Betterup's community of coaches and customers through strategic planning, among others, the company said.

"I firmly believe that focusing on and prioritizing our mental fitness unlocks potential and opportunity that we never knew we had inside of us," Harry said in the blog post.

He also said he had been working with a BetterUp coach and found it "invaluable."

"I was matched with a truly awesome coach who has given me sound advice and a fresh perspective," he said.

BetterUp raised US$125 million in February, taking its valuation to US$1.73 billion. The Wall Street Journal first reported the news of Harry's new role.

Harry and Meghan now live in Southern California and signed previous deals to deliver programming to Netflix Inc and produce and host podcasts for Spotify.

Harry also is working with Winfrey on a documentary series about mental health for the Apple TV+ streaming service.