Okla. Stat. tit. 51, § 59

When articles of impeachment shall be presented to the Senate, the Senate shall within ten (10) days thereafter organize as a court of impeachment, and may for the purpose of conducting the business of such court, appoint a clerk, who may be the secretary of the Senate. The clerk shall issue all process and keep a record of the proceedings of such court. The said court shall also appoint a marshal and an assistant marshal who shall be its executive officers. It may employ such stenographic, clerical and other help as may be required.