Have you ever thought of considering to volunteer at the European Geosciences Union?
Even though the organisation is huge (+12,000 members) it is mostly run voluntarily, employing only a handful of people primarily focused on the administrative part of the organisation.
EGU is a truly bottom-up organisation that relies on, and values, the input of its members on a variety of projects and activities. There are a number of tasks members and other interested parties can help with on a voluntary basis. If you are an enthusiastic young scientist or a GIFT teacher, or simply someone who would be interested in helping in EGU activities, then check this page: http://www.egu.eu/structure/volunteer-work
EGU acknowledges the support of volunteers by, for example, lining their articles or naming them as reviewers or translators. This means you can add your EGU contribution to your CVs.
Examples you can contribute to:
Educational:
Outreach activities:
Courses database:
Division activities: