Okay, let’s tackle this. So Mark Silverman has a solid set of skills in network administration, including Cisco and Juniper technologies, which are in demand. He also has experience with Linux, which is a plus. Technical support and troubleshooting are also valuable skills. Location is Baltimore, MD, which is a mid-sized city. Industry standards for network administrators in this area suggest a rate of $75-$125 per hour. Considering his skill set and location, I estimate Mark could charge around $100 per hour.