Keep a blacklist (digitally, of course) of everyone who wastes paper. Email it to HR, facilities, your boss and an other important people at your job, on an hourly basis, until they are forced to institute company-wide recycling.
Approach leadership. Consider people who fall into these categories: Property Manager, Facilities, CFO or Finance Department, Community Development Office, Sustainability Office, Human Resources. If your organization is on the smaller side, consider approaching the CEO. At the very least, you will need people who have knowledge about the building and physical space, waste management, and finances of the company. Here's a pre-made email template to help you start.