The part of the sentence "looking forward to working together again" is correct and usable in written English. You can use it when you want to express excitement and anticipation for the opportunity to collaborate with someone on a project again in the future. For example, you might say: "It was great working with you on this project. I'm already looking forward to working together again soon.".
Steven is not upset with Tom.... Tom and Steven remain close friends and are looking forward to working together again.
Both insist they know their places and are looking forward to working together.
Just rang Nicola Sturgeon to say I'm looking forward to working together with her for the good of Scotland.
"I look forward to the new challenge and I'm looking forward to working together with everyone at a club that has great aspirations for the future".
But Mr Avaliani disputes this, saying that many Georgian farmers are looking forward to working together with the South Africans.
"UNICEF is proud of this partnership and looking forward to working together with Real Madrid and UNICEF Spain," said Carol Bellamy.
"I look forward to working together".
Ludwig does not simply clarify my doubts with English writing, it enlightens my writing with new possibilities
Simone Ivan Conte
Software Engineer at Adobe, UK