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CGI vice president Cheryl Campbell said in her prepared testimony that the administration was the "quarterback" of the entire effort.
Her testimony seemed to place some of the blame on QSSI for its registration system, which created a "bottleneck" that stopped people from registering. With those problems mostly resolved, Campbell said, it is up to CGI to make sure that the exchange site is up and running, but she said some of the issues the site had already seen couldn't have been helped.
"We acknowledge that issues arising in the Federal Exchange have made the process for selecting and enrolling in qualified insurance plans difficult to navigate for too many individuals," she said.
"Unfortunately, in systems this complex with so many concurrent users, it is not unusual to discover problems that need to be addressed once the software goes into a live production environment."
But Campbell also said the online exchanges, while buggy, had some successes and would ultimately be fixed.
"The system is working. People are enrolling. But people will be able to enroll at a faster pace," she said.
CGI Federal is a subsidiary of a multibillion-dollar Canadian firm, CGI, and has created other federal websites, including the portal for Medicare. It has also been involved extensively in Housing and Urban Development contracts.
The company won a $93 million bid for the HealthCare.gov project in 2011. It has also recently ramped up its lobbying efforts in Washington, the Post reported.
Meanwhile, Democrats are worrying aloud about persistent problems with the rollout. Rep. Richard Nolan of Minnesota emerged from a Wednesday morning meeting with administration health care officials on Capitol Hill and told The Associated Press that the computer fiasco has "damaged the brand" of the health care law.
"The president needs to man up, find out who was responsible and fire them," Nolan said. He did not name anyone.
Likewise, in the Senate, Florida Democrat Bill Nelson said somebody should be held responsible for the glitches.
"That's the problem in government today," Nelson told ABC's Miami affiliate. "People are not held to account."
Obama says he's as frustrated as anyone and has promised a "tech surge" to fix the balky website. White House spokesman Jay Carney also said the administration will be more open about the problems.
After more than 20 days without briefing the media, the Department of Health and Human Services will start regular sessions on Thursday, he said.
On the defensive, the Obama administration acknowledged Wednesday that the problem-plagued website didn't get enough testing before going live. It said technicians were deep into the job of fixing major computer snags but provided no timetable.
Al Jazeera and The Associated Press