adding mehans picture

_participants/mehan-jayasuriya.md

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 title: Mehan Jayasuriya
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 <h3>Mehan Jayasuriya</h3>
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 <p><a href="http://mehan.info/" target="_blank">Website</a> | <a href="https://twitter.com/mehan_j" target="_blank">Twitter</a></p>
 <p>Mehan Jayasuriya is a technologist and writer based in Portland, Oregon. He is currently a Program Manager at Mozilla, where he oversees the NSF-WINS wireless innovation challenges, which focus on connecting the unconnected in some of the most difficult scenarios. He has previously worked for a variety of technology companies, academic institutions and non-profits, including Tumblr, NYU, General Assembly and Public Knowledge; his writing on culture, technology and policy has been published by The Guardian, Pitchfork and Gizmodo.</p>
 
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 <h2>Presenting</h2>
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