The majority of business directors in the Republic believe Ireland needs to "actively address" improving relations with the UK ahead of Brexit.
With the UK set to leave the European Union this Friday, 89% of the business leaders surveyed by the Institute of Directors said the Republic should create better dealings with its nearest neighbour in a post-Brexit scenario.
Maura Quinn, chief executive of the Institute of Directors, said: "While it is encouraging that the Ireland-EU relationship has held firm during the Brexit process to date and is looked upon with some optimism by directors, it is Ireland's relationship with the UK that is a cause for some concern and needs to be addressed, after what has been an arduous and challenging Brexit process."
The latest quarterly 'Director Sentiment Monitor' took place at the end of last year.
Despite ongoing concerns around the type of trading relationship that will exist between the UK and Ireland, six in 10 survey respondents believe that the financial performance of their organisation will improve this year.
In addition, 30% of business leaders were more optimistic than they were in the third quarter of 2019, when the figure was just 9%.
However, in the short-term a massive 88% of business leaders believe that Brexit's impact on the Irish economy will be negative. This falls to 47% when asked about the long-term.