MESIA has over 100 local and international members including ABB, ACWA Power, ALSA Solar, ALSA Solar, Covington & Burling, Enviromena, Eversheds and Sutherland, Eversheds and Sutherland, Huawei, Microtron Technologies, SkyPower, Synergy Consulting Inc, Value Addition. Member companies are from all segments of the value chain, such as finance, engineering, professional services, manufacturing, and contracting companies.

Any company that is involved in the Middle East solar industry is welcome to join MESIA.