Volunteer Resources Volunteer Leadership is Vital Active and dedicated volunteers are the decision-makers and leaders of the IEEE CSS Society. Join IEEE CSS Travel Policy View the IEEE CSS travel policy. Concur Information Tips for Completing Your CSS Expense Report in Concur. Membership Link Become an IEEE CSS Member! IEEE.org Official website of IEEE. Why Volunteer with the IEEE CSS Society? Advanced the Field Drive the evolution and growth of your technical area. Make Connections Network with and advise other professionals worldwide. Propel Your Career Sharpen your professional skills.