The ESRI Summer Internship Program provides valuable work experience while you continue your education or prepare for life after graduation. The program is open to both undergraduate andgraduate students. Internships are available at Esri headquarters in Redlands, California, and in our regional offices throughout the United States. Each internship is a paid position and is up to 12 weeks long.
For full description: http://www.esri.com/careers/category/summer-internships.html