The powerfully built bodyguard has previously revealed he was inspired to join the Secret Service after watching the Clint Eastwood film ‘In the Line of Fire’.
In an interview he said: ‘I was enamoured with the whole secret service mantra and the mystique of the secret service’.
During a 14-year career he became part of the protection detail for President George W Bush and Barack Obama.
Sanchez was first spotted with the couple when they attended the Invictus Games in The Hague, Netherlands, last year, their first joint overseas trip since ‘Megxit’ when they chose to leave royal duties for a life for California.
The burly ex-police officer mostly followed Meghan when she went on a walkabout at the venue.
He was always one step behind the Duke and Duchess of Sussex and gave orders to other members of the security detail who accompanied the pair.
Sanchez was also by the couple’s side when they were involved in what their spokesman called a ‘near catastrophic chase during a visit to New York in May.
The couple’s spokesman claimed a pursuit by paparazzi photographers as they left the Ziegfield Theatre in New York City had endangered the lives of others and said they were involved in a high speed ‘relentless’ chase around the streets of Manhattan.
The Sussex’s version of events was called into question by police who simply said their trip back to their private accommodation had been ‘challenging’ but said no arrests were made.
A US based photographic agency denied that their staff had caused problems for the couple.
Sanchez will accompany the Prince when he carries out his first official engagement of the Invictus Games later today.
He is to meet the Mayor of Dusseldorf at the city’s Town Hall and sign a Golden Book which is reserved for VIP visitors.
Harry will later travel three miles to the Merkur Spiel-Arena when he will formally open the Games in front of the 500 competitors, friends and family.
Harry is scheduled to speak for seven minutes as he salutes the athletes from 21 nations.
The biggest cheer of the night is likely to be for the Ukrainian team with organisers saying they expect ‘goosebumps’ when they make their entrance.
Grammy award winning rapper Macklemore will perform at the end of the ceremony which will also features speeches from the German Chancellor Olaf Scholz and the Mayor of Dusseldorf Dr Stephan Keller.
Over 100,000 visitors are expected to attend the week long games involving wounded and disabled military veterans as well as serving personnel.
Harry will later take part in the German version of ‘Match of the Day’ where he will talk to the show’s hosts about the Invictus Games.