Non-PRO English to Spanish Social Sciences Human Resources employee´s handbook

I HAVE ENTERED INTO MY EMPLOYMENT RELATIONSHIP VOLUNTARILY AND FOR NO SPECIFIED LENGTH OF TIME. I ACKNOWLEDGE THAT THE TEAM MEMBER HANDBOOK IS NOT A PROMISE OR CONTRACT OF EMPLOYMENT AND THAT MY EMPLOYMENT IS AT WILL, WHICH MEANS THAT EITHER AIMCO OR I MAY TERMINATE MY EMPLOYMENT WITH OR WITHOUT CAUSE AT ANY TIME AND WITH OR WITHOUT ADVANCE NOTICE, PROCEDURE OR FORMALITY. I UNDERSTAND THAT THE AT-WILL NATURE OF MY EMPLOYMENT MAY BE MODIFIED ONLY BY A WRITTEN NOTICE SIGNED BY AIMCO’S CHIEF EXECUTIVE OFFICER, PRESIDENT, OR EXECUTIVE VICE PRESIDENT OF HUMAN RESOURCES.