Systems Administrator; Windows, Azure, Networking

Description

Delavan Holdings is a diversified holding company with interests spanning automotive retail, RV dealerships, hospitality, logistics, industrial services, and professional services across Wisconsin and the greater Midwest. Our portfolio includes Kunes Auto Group, Kunes RV, Lake Lawn Resort, Camp Timber-Lee, G10 Fulfillment, and Ignition Dealer Services. The Office of the CTO is building a small, senior technology team at the holding company that serves every operating company in the portfolio, and this is one of five roles we are adding to it.

This is the hands‑on systems and network administration role at the holding company. You will keep core IT systems patched, monitored, backed up, and genuinely recoverable, serve as the escalation point past frontline support, and drive consistency across entities that have historically each done things their own way.

• Administer on-premises Active Directory across entities, including domains, group policy, DNS, and DHCP, and maintain hybrid identity sync into Entra  partnership with the Platform Engineer
• Manage the full user lifecycle with standardized provisioning, deprovisioning, and group and access management
• Administer the workplace productivity and collaboration suite across entities, whether Microsoft 365 or Google Workspace, including email, file sharing, and licensing
• Manage endpoints through their lifecycle in Intune or similar tooling: enrollment, configuration baselines, patching, and secure disposal
• Build, operate, and maintain Windows and Linux servers and the virtualization platforms beneath them, such as Hyper-V or VMware, both on-premises and in Azure
• Administer site networking at the parent company and operating-company locations, including switching, VLANs, firewalls, wireless, and VPN connectivity, with configurations documented and consistent across sites
• Own backup and recovery for systems in scope, including schedules, monitoring, and regular restore testing
• Own the certificate, DNS, and domain lifecycle across entities, including public DNS records, domain registrations and renewals, and TLS certificate issuance and expiry, so nothing lapses silently
• Maintain IT asset and license management across entities, including hardware and software inventory, license assignments and true‑ups, and renewals
• Monitor system health, respond to alerts, and act as the escalation point beyond frontline support: troubleshoot to root cause, communicate status, and document RCAs for significant incidents
• Implement a standardized ticketing platform and escalation process across operating companies, in partnership with operating-company IT teams
• Standardize and automate routine administration with Power Shell, so common tasks are repeatable, documented, and auditable
• Follow a disciplined change process in which changes are requested, approved, tested, applied, and logged
• Maintain SOPs, runbooks, version‑controlled scripts in Git Hub, network maps, and system diagrams so others can support the environment
• Partner with Engineering, IT, vendors, and internal stakeholders to support acquisitions, site turn‑ups, and office moves

• 3 or more years in systems administration or a closely related role operating production IT systems across cloud and on‑premises environments
• Hands‑on Active Directory administration, including group policy, DNS, and DHCP, plus hybrid identity into Entra
• Experience administering Microsoft 365 or Google Workspace, including email, collaboration, and file‑sharing administration. Comfort with the shared concepts matters more than which platform
• Endpoint management tooling such as Intune, including configuration baselines and patch management
• Experience with RMM,…