Andrew B. Zwieg

Information Technology Manager

Columbus Chemical Industries • Watertown, WI

Mar 2023 – Jul 2026

Sole IT team owner responsible for networking, servers, helpdesk, and firewall operations for the entire organization
Rebuilt VMware environment on Proxmox and migrated core Windows infrastructure to Linux, cutting licensing overhead
Designed and implemented high-availability, multi-site infrastructure with all builds automated via Ansible
Migrated Datacor ERP from on-prem to cloud hosting and integrated camera, badge, and fire alarm systems
Developed custom in-house web applications (OPV, CAPA) and stood up DR replication for backups and PostgreSQL
Rolled out REI3 helpdesk/knowledge base/asset management and enterprise monitoring (Nagios, Cacti, LibreNMS)

Senior UNIX Administrator

Sentry Insurance

Sep 2021 – Mar 2023

Managed enterprise UNIX configuration automation and CI/CD tooling using Ansible, Bitbucket, Packer, and Pulp
Supported cloud and infrastructure-as-code initiatives with AWS, Terraform, and HPSA/HPOO

Database Administrator I / Senior UNIX Engineer

Medical College of Wisconsin

Apr 2020 – Sep 2021

Administered Solaris architecture and migrated authentication from VAS/Quest to Active Directory
Developed unified Solaris/Linux templates and managed Solaris Zones/CDOM/LDOM HA configurations and ZFS storage
Supported Oracle E-Business Suite, Tomcat/WebLogic instances, and performed rapid-clone environment refreshes
Managed Oracle, PostgreSQL, and MySQL databases, including user/permission administration and troubleshooting

Senior UNIX Engineer / Solution Architect

MGIC, Inc.

Sep 2014 – Apr 2020

Provided Tier 3 UNIX/Linux support and solution design for Oracle RAC and enterprise MQ within a DevOps/Agile framework
Led OS migrations (Solaris 9→RHEL5, Solaris 10→RHEL6, RHEL5→RHEL6→RHEL7) and Hadoop/Oracle installation and administration
Managed LDAP, DNS/DHCP, Samba, and Postfix mail infrastructure; provisioned servers via Kickstart, BladeLogic, and Puppet
Ran quarterly 24-hour DR exercises, led enterprise monitoring (Nagios, Cacti), and mentored junior Linux administrators

UNIX Administrator

ComSys, Inc.

Oct 2013 – Sep 2014

Administered CentOS/RHEL and mixed UNIX systems, LDAP, and BIND/DNS/DHCP/CUPS infrastructure
Migrated environment from Linux to Windows/Active Directory and upgraded Zimbra mail for 300+ users
Built and deployed PXE/Kickstart provisioning and administered Xen Server in HA configurations

Windows/UNIX Systems Administrator

Duncan Solutions

Apr 2012 – Oct 2013

Administered Oracle Linux (RAC, ADG, DG, OEM) and EMC SAN storage across a 200-node, 600-VM global datacenter
Provided Tier 2 support for 2,000 end users and coordinated with DBAs on Oracle Linux/SAN configurations
Managed PCI-scoped servers, backups/restores, and assisted with disaster recovery site setup

IT Systems Administrator

ANIMART, Inc. • Beaver Dam, WI

Nov 2010 – Apr 2012

Led datacenter relocation and stood up Hyper-V virtualization managed via SCVMM 2008
Administered Exchange, SBS Server, NetApp FAS2020 storage, and Nortel PBX; achieved company PCI compliance
Designed and implemented the company's disaster recovery program and standard operating procedures

Computer Repair Technician

Lightning PC • Oconomowoc, WI

Dec 2008 – Nov 2010

Diagnosed hardware/software failures and provided phone, email, and on-site support for small business networks (1–300 PCs)
Deployed Exchange 2010 and Windows Server 2008 R2 at multiple customer sites

Network Admin Assistant

Dodgeland School District

2005 – 2007

Migrated Novell 6/GroupWise environment to Active Directory and Exchange; deployed Windows XP district-wide
Ran classroom network cabling, patch panel configuration, and district helpdesk support

Core Technical Skills

Operating Systems

Virtualization & Cloud

Automation

Storage & Databases

Identity & Networking

Monitoring & Compliance

AI Tools

Professional Experience