First opportunities that come to my mind:

• data mining
• systems design, that can have high thoughput
• geographic information systems
• performance analysis and finding bottle necks in systems
• embedded systems programming
• hardware software interface in mobile systems
• operating systems for mobile devices
• mathematical models in finance
• power grid networks management systems

First opportunities that come to my mind:

• data mining: it is used by e-commerce websites like Amazon to understand consumer behavior; also used by banks to calculate how likely the debt will be payed back;
• systems design, that can have high throughput: this is used by search engines like Google, but also in conterterrorism, and finance;
• geographic information systems: companies like TomTom and Foursquare, but also airports and airline companies
• performance analysis and finding bottle necks in systems: this is any company that has a big investment in ICT;
• embedded systems programming: Siemens, Ericcson and other companies and producers of embedded devices, also electronics for cars;
• hardware software interface in mobile systems: Motorola, Samsung, Apple, you name it;
• operating systems for mobile devices: Nokia and Microsoft are doing a lot of work here, also Google and Apple
• mathematical models in finance
• power grid networks management systems: Austin Energy, Etap