The squad features 10 players who had been involved in the 2016 wider squad, while four players have been recognised for their performances in the New Zealand Schools' team earlier this month.
"We'll assess the boys on strength and conditioning, body composition, skill set and technical knowledge of the game. From there we can put together a clear plan with specific goals and guidelines for each player so they know what is expected from them."
Most players will be involved with Super Rugby development or age group programmes at the start of 2018 before assembling again in March. A squad will be selected from the development group to play in the Oceania Tournament in April in Australia.
Philpott will once again be joined by assistant coach Willie Rickards and scrum coach Dave Hewett, with David Hill (Bay of Plenty) also joining the coaching team in an assistant's role.
"It's great to have continuity in coaching with three of the four returning for another campaign. And David is familiar with our programme as he's worked as a skills coach in the past so has a clear understanding of what we are trying to achieve."
The 2018 Under 20 Championship schedule (dates and venue) has yet to be confirmed.