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Course Description

This S-231 course was developed using a blended approach to learning, meaning that it contains a mix of online and instructor-led training (ILT). Students are required to complete the online training portion of the course and pass an online assessment prior to taking the ILT. The focus of this online training is to teach knowledge and concepts. The ILT will reinforce the content learned online and provide opportunities to apply this knowledge to real-world scenarios and practical exercises. Upon completion of the ILT, students must then take and pass a final assessment in order to receive credit for the course. The final assessment covers content from both the online and ILT portions of the course.

Note: Instructors must order course materials (NFES 002971 S-231 Instructor Guide, NFES 002973 S-231 CD-ROM Course Materials, and NFES 002972 S-231 Student Workbook) for the classroom portion of the course. Please reference the NFES Catalog Part 2: Publications at ordering information.

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  • Perform the tasks of an Engine Boss in making the tactical decisions required to safely manage an engine and personnel on an incident.
Course Components and Hours to Complete

Course components

Hours to complete

Pre-selection assessment


Pre-course work


Online training


Instructor-led training




Target Group

Personnel desiring to become qualified as an engine boss (ENGB).

Minimum Course Administrator/Instructor Qualifications

Course Administrator must be qualified as engine boss (single resource) (ENGB).
Lead instructor must be a qualified strike team leader engine (STEN) or task force leader (TFLD).
Unit instructors must be qualified as engine boss (single resource) (ENGB).
Also see Instructor Certification at the beginning of the Field Managers Course Guide.

Course Prerequisites

Successfully completed either Crew Boss, Single Resource (S-230) or Crew Boss (Single Resource)(Blended) S-230.

Course Level


Course Access

Online Component: NWCG Online Training