noun which may take the genitive case particle 'no'
government-affiliated; state-dominated; government-run
Describes organizations, institutions, or entities that are closely tied to or controlled by the government, often used as a modifier with の.
政府系の金融機関が融資を行った。
A government-affiliated financial institution provided the loan.
その企業は政府系のファンドから出資を受けている。
The company receives investment from a state-dominated fund.
民間 means private or non-governmental, the opposite of 政府系.
Compound of 政府 (government) and 系 (system, lineage, affiliation). The exact historical derivation is uncertain, but the word follows a common pattern for describing organizational affiliation.