Poels will once more find himself under the tutelage of former Sky coach Rod Ellingworth who joined the team this year.
"It’s impossible not to admire what Team Bahrain Merida has achieved in less than three seasons," Poels said.
"I look forward to playing a key part in its future success.”
"I will also find [there] Rod Ellingworth with whom I had a good experience in the past."
Wout Poels has been looking for a more prominent leadership role, so this move seems a sensible one for a rider who was facing ever stronger competition for the GC roles at Team Ineos.
Bahrain-Merida will have been an attractive proposition to Poels, not least because of the presence of Rod Ellingworth. It is a poorly-kept secret that the team are soon likely to become a McLaren outfit, which means extra investment and the likelihood of further big-name additions.
Poels' arrival follows hot on the heels of Mikel Landa's move to the team, while it has been strongly rumoured that Mark Cavendish may also be switching to the team ahead of the 2020 season.
- Views of Tom Bennett, Eurosport UK Cycling Editor
Wout Poels snatches victory on saturated stage seven