Two of Morris County's largest healthcare and medical companies will be reducing their staffs by a combined 515 employees before the end of 2016. WARN Notices, or Worker Adjustment and Retraining Notification Act notifications, were issued to 350 employees at GlaxoSmithKline in Parsippany, and another 165 were given to employees at Zoetis, Inc. in Florham Park, according to the New Jersey Department of Labor and Workforce Development.