Plano Independent School District trustees unanimously accepted the resignations Tuesday of Superintendent Brian Binggeli and Board Trustee Greg Myer.
Myer was elected in May, and Binggeli took over as superintendent in 2015.
A district spokeswoman said the resignations were not related and the timing of both is a coincidence.
In a brief resignation letter addressed to the board president, Myer wrote he is resigning for "personal reasons." There was no additional information.
Binggeli has not given a reason yet for his resignation. In an email to staff Tuesday morning, Binggeli wrote in part, "...the Board and I will announce that we have entered into a mutual separation agreement."
His resignation letter to the district said he plans to "pursue opportunities potentially closer to home."
Binggeli, 58, was previously the superintendent of schools for Brevard Public Schools in Florida, which last week settled a multi-million dollar lawsuit with a software company.
The lawsuit filed in 2013 claims the district paid $5.9 million for software it did not fully receive.
The lawsuit was settled last week for $50,000.
In Tuesday's board meeting, Binggeli read a prepared statement thanking the district and its employees for their support.
He refused to answer questions from the media after the meeting but said the settlement in Florida has nothing to do with his resignation.
In a statement, the Plano ISD says Binggeli's departure is because of "differing leadership philosophies."
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Binggeli replaced Richard Matkin, who retired in January 2015. Matkin took over for Doug Otto, who retired after nearly 17 years in January 2012.
Sara Bonser, the district's deputy superintendent, has been named the interim superintendent.
Binggeli will be paid $307,000 for nine months salary and unused vacation time.
His resignation is effective Jan. 31.