I'm starting a new role that will be more focused on systems administration at a young, rapidly growing company. The infrastructure and processes are still being built, and I expect to work with Active Directory, Group Policy, security, standardization, and automation while also having opportunities to suggest improvements.
I've worked in IT for more than 10 years, including several years as a 2nd-line service desk specialist in an international environment. My experience includes Windows Server, Active Directory for more than 1,000 users, Exchange, PowerShell, 3CX, Zabbix, ManageEngine, Azure, and Microsoft 365. Earlier in my career I worked with first-line support, DHCP, workstations, hardware, documentation, and IT procedures.
I've also worked on projects such as monitoring deployments, 3CX and IP phone implementations, office moves, network setup, Hyper-V, RDP, PowerShell automation, and application virtualization. Most of my knowledge is self-taught through documentation, home labs, and hands-on projects.
Recently I built a Windows lab covering topics such as AD and OUs, GPOs, least privilege, Defender and firewalls, auditing, AppLocker, RDP, Windows Update policies, LAPS, BitLocker, folder redirection, USB restrictions, software deployment, administrative tiering, Entra Connect, hybrid join, Intune, MDM, and Autopilot. I also have some experience with Linux, OpenBSD, networking, WireGuard, firewalls, Git servers, automation, and monitoring.
For people who have made a similar move from support into system administration: what would you recommend learning or refreshing before starting? Which areas are most useful during the first few months, and what would you prioritize with some free time beforehand?
I'm also unsure how much value courses and certifications would provide at this stage. Would certifications around Windows, Active Directory, Azure or Entra, and Intune be worthwhile, or would labs and real projects be a better investment? I'd especially appreciate advice about common mistakes, adapting to a new environment, and useful improvements to introduce at a growing company.
5 Answers
Start by learning the actual job rather than trying to master every technology in advance. Find out what the manager considers urgent, understand the existing environment, and identify the biggest operational risks. Your technical background is already broad enough to get started; the first months should be about learning how this company works and where your effort will have the most impact.
The biggest shift is usually not another product or certification. Sysadmin work is about understanding the business, turning vague requests into workable requirements, and choosing an appropriate solution based on cost, risk, reliability, and effort. Learn the company’s priorities, document what you find, and build relationships with the people who depend on the systems. Being reliable and able to explain trade-offs is often more valuable than knowing one additional tool.
Try to understand the difference between a temporary workaround and a proper fix. Sometimes a quick solution is justified, but make the risk and follow-up work visible so it does not become permanent by accident.
Use your free time for focused labs and small end-to-end projects rather than collecting courses. For example, build a documented identity and endpoint-management setup, test backups and restores, practice recovery from a failed domain controller or server, and automate a repetitive task with PowerShell. Those projects will strengthen both your technical skills and your ability to document and operate systems safely.
Do not overlook communication and patience. A successful administrator has to explain why secure, resilient, or scalable infrastructure costs more than a quick consumer-grade purchase. Learn how decisions are made, set realistic expectations, and become someone colleagues can rely on. That people-and-business side of the role is often what separates a capable technician from an effective sysadmin.
In a new environment, spend time assessing before making major changes. Inventory systems, dependencies, owners, licenses, administrative access, monitoring, backups, patching, and security gaps. Establish good habits around change records, documentation, least privilege, and tested recovery procedures. Certifications can help if the employer requires them or if you need a structured study plan, but with your experience they are probably less valuable than understanding the company’s systems and delivering a few useful improvements.
Also get to know people outside IT. Reception, facilities, security, and other departments often know how the business really operates and may be important contacts during incidents or after-hours work.