It is constructive when an employee resigns because an employer acting directly [or through persons effectively representing such employer, namely an [officer] [director,] [managing agent] [or] [supervisory employee]] either intentionally creates, or knowingly permits to exist, working conditions that are so intolerable or aggravated at the time of the resignation that a reasonable employer would realize that a reasonable person in the employee’s position would be compelled to resign.

See also…

Labor and Employment Law

Hiring, Firing, Wrongful Termination