He has since been charged with 17 offences, including four of espionage, two of attempted espionage, two of possession of an objectionable publication and three of accessing a computer system for a dishonest purpose.
The soldier also faces one charge of doing an act likely to prejudice service discipline or bring discredit to the service, one charge of negligently failing to perform a duty and four charges of failing to comply with written orders.
The charge sheets
Charging documents, laid by the Director of Military Prosecutions, give more detail about what the soldier is accused of doing.
They allege he was a member of far-right groups the Dominion Movement and Action Zealandia between an unknown date in 2017 and 13 December 2019.
They also state he failed to report finding classified documents after he was allegedly found with a Pams chiller bag containing intelligence training materials, at a 'restricted' classification level.
The charge sheets also state that on or about 20 November 2019 he failed to report contact from what he believed was an official of a foreign country to the Defence Security Directorate.
The country at the centre of this case cannot be made public after the Chief Judge of the Court Martial's Chief Judge Kevin Riordan moved to suppress it, along with the identities of half a dozen expert Crown witnesses.
The charge sheets allege the soldier also copied telephone directories from the Linton, Burnham and Trentham military camps with the intent to share them with a person acting on behalf of a foreign country.
This alleged offence makes up the espionage charge; a rare offence found in the Crimes Act 1961 that carries up to 14 years' imprisonment for anyone who prejudices the security or defence of New Zealand.
The soldier is also accused of illegally obtaining, copying and attempting to share military telephone directories, maps of army camps and access codes and passwords that would allow unauthorised access to several military bases.
One of the charges also alleges he was found with Defence Force ammunition without proper authority.
The soldier was due to stand trial in a Court Martial next week but this has been postponed to allow for further pre-trial hearings that are yet to be set.