Southern Careers Institute’s Campus of San Antonio South: You’ll Leave With the Hands-On Training and Certifications You Need to Compete! A short drive from San Antonio’s River Walk District, Southern Careers Institute’s San Antonio South campus is located in the seat of Bexar County. Located on SW Military Drive, this campus is ideal for anyone living in the South and East San Antonio area. Although the campus is located in the second most populated city in Texas, our students enjoy a close-knit, supportive, family-like environment.