HARRISBURG - A top education adviser to Gov. Tom Corbett who previously served as education secretary is leaving after questions were raised about his duties and work schedule.

The Education Department said Tuesday that Ron Tomalis' last day as Corbett's special adviser on higher education will be Aug. 26.

Tomalis' resignation letter to the acting education secretary, Carolyn Dumaresq, says he's exploring new opportunities and that his departure was in the administration's best interests.

The Pittsburgh Post-Gazette reported late last month that it found little evidence of the work he was performing in the $140,000-a-year job.

The paper said his work calendar had weeks of little or no activity, phone logs that averaged barely a call a day and only five outgoing emails.

Tomalis' resignation letter didn't directly reference those issues.