The internet analyst is to join venture capital firm Kleiner Perkins Caufield & Byers (KPCB) as a partner.
At Morgan Stanley the post holder was head of the global technology research team and worked with a range of companies including Google, Microsoft and eBay.
Ms Meeker has been credited with having the âuncanny abilityâ to predict new technology trends and was an early advocate of the internet and social networking.
She said: âKPCB has a long and exceptional track record of helping entrepreneurs build world-changing ventures and launch new industries.â
âWeâre at the beginning of another great wave of tech innovation and I am incredibly excited by the opportunity to help the next generation of Internet technologies and leaders.â
John Doerr, KPCB partner, added: âMary was an early supporter of some of the biggest technology investment winners of the past 20 years.â
âHer advice and support are already highly sought after by entrepreneurs and in this new role, she will be able to spend even more time providing more direct assistance.â
Before joining Morgan Stanley, Ms Meeker was a technology research analyst at Cowen and at Salomon Brothers.
By Jim Ottewill