20 network printers - Printer support is one of the lowest tiers of IT pay. Saying you worked somewhere too poor to outsource it (or have a tier 1 bench guy to deal with it) implies lower wages.
Configured and maintained several virtual environments, including Windows XP and Microsoft Server 2003 - A 16 year old, and 13 year old operating system have nothing to do with a virtual environment. This line right here I would have thrown out the resume over.
Deployed several ADP time clock server systems for use both locally and out of state - How about Deployed and supported HR tracking system across state lines. Time clocks also are pretty low on the pay value standpoint.
Developed and implemented several quality control processes. Tell me more specifically as well as what the outcome was. Ex. "Standardized on a common image and application deployment system with SCCM and Airwatch to cut new employee setup from 1 week to 15 minutes, with Mobile device app deployment being self service." What you did, what business problem it fixed, and how impactful was it.
Organized several networking closets, maintaining business continuity and reducing network latency. Another meaningless sentence. "Brought in structured cabling, flattened 3 tier network design to leaf spine, solving multicast problems for imaging performance, and reducing the support and management costs by 50%" Cleaning up some cables in a closet, and color coding them makes it sound like you didn't have much productive work to do and were bored.
Managed setup and maintenance of Active Directory, Windows 2003 server - More highly generic phrasing. - Deployed GPO's to homogenize configurations, automate printer and application deployments of end user devices, and reduce application ticket support by 60%. Your original sentence implies you had a single 2003 server in the entire place, and somehow that kept you occupied for 5 years. This isn't something I'd want to highlight that the environment was this small/simple.
Network Administrator Junior - So this place had one server and you were the junior guy? I tend to drop superlative title bits that don't really make sense (I would simply say network administrator). I used to have a title that was 4 works long (Junior Assistant Systems Analyst) or some nonsense that 3 of the 4 words implied I was a lackey. I simply put Systems Administrator (What most closely tied to my job) on my resume.