He has had a storied career of school leadership controversy. From 1995 to 2001 he was Chief Executive Officer (CEO) of Chicago Public Schools, creating more controversy toward the end of his term there, before Arne Duncan really started attacking the Chicago Schools.
In the early and mid-2000s he sometimes ran for elected office and other times toyed with the idea. His highest goal was Illinois governor, but he lost to the inestimable Rod Blagojevich in the Democratic primary. --Yes, Democratic; note that! The liberal party has spearheaded privatization destruction of urban school systems, all in the name of "reform," informed by "free market" thinking principles.
For a short stint beginning in 2002, he led Philadelphia, Pennsylvania's schools. There he led ambitious efforts to outsource school management to all kinds of institutions outside the municipal school system, non-profits colleges, for-profit institutions.
Not long after, he moved on to Louisiana to destroy its school system, exploiting the natural disaster and collapse of governmental leadership in New Orleans, Louisiana, as he led the creepily named "Recovery School District of Louisiana." He supposedly created "gains" for the system, but observers called it a financial scam. He served there from 2007 until 2011, although not without flirting with political ambitions elsewhere.
And after another natural disaster, an earthquake, he did brief work for the Haitian president to "reform" Haiti's educational system.
On June 28, the judge finally removed Vallas from his post at the head of Bridgeport schools.
Yet, worse than merely being without education credentials, his record at each of the city school systems was initiating a legacy of school mismanagement. The outcome has been administrative disorder, and teachers a precarious work experience, and for students a precarious learning experience. More specifically, his record at all these urban school systems has been the mass firing of teachers, particularly teachers of color. Merely removing him from his post is not enough. Maybe there is some way to bring him up on charges for his serial abuse of school systems.
Regarding the rule of law and the final determination that he should go, one commenter at Diane Ravitch's report ("Vallas Will Fight Judge’s Order to Go") on his case wrote of the sweet justice at work,