Supply Chain

Verified

External Information System Service Provider

Primary definition

A provider of external information system services to an organization through a variety of consumer-producer relationships, including but not limited to: joint ventures; business partnerships; outsourcing arrangements (i.e., through contracts, interagency agreements, lines of business arrangements); licensing agreements; and/or supply chain exchanges. Source: NIST SP 800-37 Rev 1; NIST SP 800-53 Rev 4

Also known asexternal service provider · third-party service provider · outsourced service provider · ESP · TSP · OSP · external IT service provider · information system vendor · cloud service provider · CSP
2 sources cited4 related termsReviewed Aug 9, 2026
Committee on National Security Systems Glossary CNSSI 4009-2015View source

Understand more election terms clearly

Get one important election term explained each week, with authoritative sources, practical context and related definitions.

Free. One useful email each week. Unsubscribe anytime.Learn more about the ESG newsletter →
CNSSGC

A provider of external information system services to an organization through a variety of consumer-producer relationships, including but not limited to: joint ventures; business partnerships; outsourcing arrangements (i.e., through contracts, interagency agreements, lines of business arrangements); licensing agreements; and/or supply chain exchanges. Source: NIST SP 800-37 Rev 1; NIST SP 800-53 Rev 4

Committee on National Security Systems Glossary CNSSI 4009-2015 · 2024

Cite this term

Permanent URL · stable across revisions
Election Security Glossary. (2026). External Information System Service Provider. In Election Security Glossary. Retrieved August 23, 2026, from https://electionsecurityglossary.com/glossary/external-information-system-service-provider

Sources

2 cited · last checked Aug 9, 2026

01

Committee on National Security Systems Glossary CNSSI 4009-2015
Committee on National Security Systems Glossary CNSSI 4009-2015

High consensus

View source

02

The Cyber Glossary
The Cyber Glossary

Multi-source

View source

Get the weekly election term

Receive one cited, source-backed election explanation in your inbox each week.

Get election terms explained weekly →
Free · Nonpartisan · Unsubscribe anytime.
Continue Research

Keep going from here

Three ways to go deeper on supply chain and adjacent terminology.