What is your technical proficiency?
It is hard to describe all the experiences that lead here. There are thousands of completed projects across a wide array of technical areas. Some called for more hands on work than others. The following list is far from exhaustive.
Microsoft: DOS 6.22, Windows 3.1, 95, XP, ME, Vista, 7, NT, 2000, 10, SBS, Server
Linux: Debian, Mint, Ubuntu, Android, iOS, Red Hat, BSD
TCP/IP, DNS, Routers, Firewalls, Secure Sockets (SSL), VoIP, Apache, Bind, E-MAIL, Postfix, Dovecot, DKIM, SPF, MS Exchange Server, Active Directory, Samba, Internet Information Server, SQL Servers, Virtual Private Networks (VPN), Virtualization, HyperV, QEMU, Outlook, Evolution, Thunderbird, Terminal Server, Citrix, LexisNexis, Lotus Notes, Dynamics. Great Plains, SAP, Customer Relationship Manager, Enterprise Resource Planning, Point of Sale, SharePoint, WebEx, Databases, MS Access, MS Office, Excel, Word, Calc, Phone Switches, Interactive Voice Recorders, Private Cloud Infrastructure, Azure, AWS, and on and on it goes...
So bring your challenges. Most problems have been solved more than once already.