Berryman was also involved in the plan's execution, once more becoming chief of staff at New Guinea Force under Blamey in August 1943. Berryman was frustrated at the failure of Vasey's 7th Division to destroy the Japanese retreating from Lae, and personally annoyed by the way that Vasey forwarded compliments to Major General Ennis Whitehead while leaving any complaints about air support to be taken up by Berryman. Berryman was next involved with the planning for the landing at Finschhafen, brokering a compromise landing plan between Rear Admiral Daniel E. Barbey and Lieutenant General Sir Edmund Herring. When Berryman discovered that the United States Seventh Fleet did not intend to reinforce the 9th Division he immediately went to Blamey, who took the matter up with MacArthur. However, it was Berryman who brokered a compromise deal with Vice Admiral Arthur S. Carpender to reinforce Finschhafen with a battalion in APDs.