The person most responsible for repairing the botched healthcare.gov website has no official title.

If Jeffrey Zients, President Obama's “Mr. Fix-It,” is the public face of the Obamacare cleanup effort, Michael Dickerson, a site-reliability engineer on leave from Google, is the invisible man overseeing hundreds of urgent repairs.

Technically, Dickerson is a subcontractor for Quality Software Services Inc., the company tasked by the Obama administration with fixing the glitch-ridden online marketplaces.

He was recruited because of his private-sector chops, which the administration thought would increase the odds of salvaging the most comprehensive overhaul to health care since Medicare.

His public persona, though, hardly draws attention to the enormity of his undertaking.

Dickerson's LinkedIn page reads simply, “No Fancy Title, Thanks at QSSI.” Listed among his self-described skills are “herding cats” and “breathing.”

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