When two or more subjects (supervisor, employees) are joined by or or nor, the verb should
agree with the closer subject. Because the closer subject is the plural employees, use were.
United States – BUSPROG.BENG.GUFF.17.6.6 – DISC.BENG.GUFF.17.6.6
United States – BUSPROG.BENG.GUFF.17.6.7 – DISC.BENG.GUFF.17.6.7
Special Rules for Subject-Verb Agreement