Adamson will have been with the generic body for nearly four years when he leaves in June.
He told OLN: "I have a hankering to go back into sales. It is slightly earlier than I probably was looking at shifting, but the right thing came along and you have got to take opportunities when you see them."
The recruitment process for his successor at NZW has started, and Adamson said he has already had "some really good responses".
"It is a fantastic role and I know that they will find a very good replacement."
At Craggy Range Adamson will take over from Michael Henley, who is returning to New Zealand to take up a wine ambassadorial and marketing role for the company.
Terry Peabody Junior, managing director of sales & marketing, said: "Our commitment to the UK and European markets has been reinforced with Warren's appointment.
"In these tight economic conditions, many are retrenching their efforts in the marketplace, our approach is very different. It is very important for Craggy Range to have one of our own people based permanently in the market to ensure all our valuable customers have a local contact point.
"Michael has done a superb job in establishing our UK and European presence and we are very fortunate to have secured Warren as his successor. Warren is a proud New Zealander with a great understanding of the UK and European wine markets. In his role with us, we are expecting him to talk about New Zealand wines as a whole as much as the wines of Craggy Range and the newly rebranded Wild Rock."