Tilman was born in Munich, Germany, and moved to California when he was young. Christina grew up in Boston and has worked and lived in the city since 2000! They have three children, Johannes (6), Lukas (3) and Lilli (infant). At home, they speak German and English. Their oldest son Johannes attends kindergarten at GISB and his little brother Lukas is in preschool.

When asked, why they chose GISB, they replied, “It was really important that we give our kids the opportunity to have a second language and international experience.” They added, “We love the spirit of the GISB community! Coffee meet-ups, school events, play dates – having all of these opportunities, in addition to the excellent learning experience, has been a wonderful bonus! We are so excited to watch our children grow up at GISB! In just two short years, GISB has helped to shape Johannes into a wonderfully sweet and caring citizen of the world. We can’t wait to see what he achieves!”