Jonathan Silver, who led the Energy Department‘s Loan Program Office that gave taxpayer-backed loan guarantees to green energy companies that ultimately went bankrupt, will join other current and former government officials in testifying Tuesday about using private email accounts to avoid congressional oversight.

Silver will testify before the House Oversight and Government Reform Committee about his use of a private email account to discuss loan applications with green energy investors who stood to profit from receiving taxpayer subsidies, according to hearing documents obtained by the Washington Examiner.