Study Guides

Study guides and preparation materials for these exams are available for purchase from the I/O Solutions website.
Empco does not sell any study guides or preparation materials directly.

Be sure you are selecting the correct study guide for the position you are testing for.

For Law Enforcement
(Police Officer/
Road Patrol Deputy)

National Criminal Justice Officer Selection Inventory²
(NCJOSI²)

For Corrections/Jail Officer
National Correctional Officer Selection Inventory v2
(NCOSI v2)

For Firefighter
National Firefighter
Selection Inventory
(NFSI)

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