premise: Without the Company's prior consent, neither your or anybody acting on your behalf shall directly or indirectly for a period of two years from the date hereof  (a) induce or encourage any employee of Zeigler to leave employment with Zeigler or  (b) employ or hire the services of any executive, managerial, supervisory, technical, or geological employee, of Zeigler, provided that you shall not be prohibited by clause  (b) above from employing or hiring the services of any person who has to be an employee of Zeigler for a period of at least 180 days prior to any direct or indirect communication of any kind between such person and you relating to possible or actual employment of such Person or hiring such Person's services.