The Warriors made sure they would be playing in the top flight of English rugby again next term with their biggest win of the campaign over Harlequins, running in seven tries as they recorded a 44-13 win at Sixways.
The result confirmed London Irish's relegation back to the Championship as the team promoted to the Premiership last season was sent straight back down for the fourth time in six years.
For Worcester, they can look forward to a third successive campaign in the Premiership after their bonus-point triumph against Quins, the result providing club captain and Ireland great Donncha O'Callaghan with the perfect send-off as he gets set to retire at the end of the season.
Solomons, who was appointed director of rugby in December, was happy to see his team get over line and was proud of the composure his players showed on such a big occasion.
"I am absolutely delighted," said Solomons. "We made the point right at the beginning of the week that we wanted to be masters of our own destiny.
"We didn't want to rely on someone else doing it for us. We have done it ourselves so I am really pleased about that."