I, myself, have been doing this for a while. But we are a team. These are my skills, but other team members have different skills. There are many that I haven’t listed. Ask, if you need an expertise you don’t see.
Website design and customization
PCI Compliance, GDPR, CCPA
SSL certificate purchase and installation (for HTTPS; this is easy, but if you need it, I can do it)
Proxy servers for DDOS attacks, caching, optimizing.
Databases (MySQL, MariaDB, Oracle, MSSQL, Paradox, MS Access, and lots more. We deal with deprecated code.)
LAMP server administration (LINUX, Apache, MySQL, PHP)
FEDORA, ELEMENTARY, CENTOS (talk to me–it’s going away), UBUNTU, DEBIAN server set-up and troubleshooting
Command line administration of most LINUX servers
WordPress, Drupal 7 & 8 (and probably 9, but I haven’t been asked yet), Magento 1.9 (talk to me; it’s out of date and vulnerable) and 2.x, CMS systems in general, Wix customization
BiblioCMS (and probably Omeka, but I haven’t been asked, yet)
Google Workspace administration, WHM, CPANEL, Git, VS