The 30-year-old placed in the top-10 in all four stages of the 2018 edition and third in the points classification.
He was also 12th at the recent Cyclassics Hamburg.
Thomson and Renshaw will be working to position both Cavendish and Janse van Rensburg for the sprint opportunities on offer.
“I’m looking forward to racing the Tour of Germany again this year,” said Australian Renshaw.
He added that last year’s race was tough, with some exciting final stretches leading into the various finishes.
“It’s great to have the event back yearly after its long period away from the calendar.
“It will be my final race in Germany and I would like to perform well after some illness last week. I hope to find my form again and enjoy the nice roads and the hard racing.
“We will have a good team for the race and will be looking to help Reinhardt. Last year he was very strong and played a part in the stages and the GC. He showed good legs in Hamburg Classics and proved he has bounced back from the Tour strongly.”