College of Southern Idaho
Trade Schools and Apprenticeships in Idaho / College of Southern Idaho
College of Southern Idaho (CSI) – Twin Falls, ID
Program Information
The College of Southern Idaho (CSI) in Twin Falls is recognized for its strong commitment to workforce development and hands-on technical education, offering several high-demand trade programs that prepare students for immediate employment in growing industries. CSI’s programs in Welding, Diesel Technology, and HVAC (Heating, Ventilation, and Air Conditioning) are designed through partnerships with regional employers to ensure students graduate with job-ready skills and industry-recognized competencies.
The Welding program at CSI provides comprehensive training in major welding methods including MIG, TIG, Stick, and Flux-Core welding. Students also learn essential fabrication techniques, blueprint interpretation, metallurgy basics, and industry safety practices. Training takes place in fully equipped welding labs that replicate professional environments, allowing students to practice welds on various metals and in multiple positions. The program prepares graduates for entry-level welding jobs in manufacturing, construction, agriculture, metal fabrication, and industrial maintenance, with opportunities for students to earn AWS or other industry certifications.
The Diesel Technology program focuses on diagnosing, maintaining, and repairing diesel engines and heavy-duty equipment used in agriculture, transportation, trucking, and construction. Students train on real engines, drivetrains, braking systems, electrical components, and hydraulic systems. The curriculum combines classroom instruction with extensive hands-on practice, giving students the experience needed to work in diesel repair shops, fleet maintenance operations, equipment dealerships, and industrial service companies. This program provides strong job placement potential due to Idaho’s significant agricultural and transportation industries.
The HVAC program prepares students for careers in heating, cooling, refrigeration, and ventilation system installation and maintenance. Students learn system design, airflow testing, electrical components, refrigeration cycles, energy efficiency, and troubleshooting techniques. CSI emphasizes field-based training so students can work with real units and practice diagnosing and repairing systems similar to those used in homes, commercial buildings, and industrial facilities. Graduates are well-prepared for apprenticeships, entry-level technician roles, or continued advancement in the mechanical trades.
Across all programs, CSI focuses on developing technical ability, safety awareness, communication skills, and problem-solving—key traits that employers consistently seek. The college also provides academic advising, tutoring services, resume assistance, and access to local employer networks. These resources help students transition smoothly from the classroom to the workforce, making CSI a strong choice for individuals pursuing hands-on trade careers.
Program Length
Programs typically take 1 to 2 years to complete, depending on the trade and credential path.
Program Requirements
- High school diploma or GED
- Completed application
- Basic math skills
Cost & Career Outlook
Based on publicly reported data for College of Southern Idaho (Twin Falls, ID) — U.S. Department of Education College Scorecard.
Program Type: Primarily Certificate or Associate Programs
In-State Tuition
Out-of-State Tuition
Median Earnings (10 yrs)
Time to Earn It Back
ROI Grade
About this data: Tuition and earnings are averages from federal College Scorecard data for comparable programs at College of Southern Idaho. Actual costs may vary by program length, residency, and supplies. Earnings reflect median salaries ten years after entering the institution. This helps estimate how quickly your training can pay off in real-world wages.
Step-by-Step Career Guides
The programs and apprenticeships listed on this page relate to hands-on skilled trades. Explore the guides below to learn about training paths, licensing, salaries, and what to expect in each career field.