Life-saving infrastructure, essential supplies, and education to displaced and vulnerable populations Believing in building systems that protect health, Solidarity is a women-founded, women-led, humanitarian engineering organization. Our mission is to provide life-saving infrastructure, essential supplies, and education to displaced and vulnerable communities at the border and beyond. Through engineering and creative problem-solving, we address urgent public health needs. Our team has a wide scope of programming that prioritizes the root causes of public health crises that often compound in humanitarian settings. We break our activities into three programs: Water, Sanitation, Hygiene (WASH) & Basic Infrastructure; Science, Technology, Engineering, Art, Mathematics (STEAM) & Play; and Data & Advocacy.