Senior Systems Administrator

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Full Time Mequon, WI, US

Salary Range: $ To $ Annually

Integrated Systems Corporation (ISCorp)is a private-cloud Application Service Provider delivering secure, reliable application hosting, infrastructure, and data processing solutions to customers and Independent Software Vendors (ISVs). We support diverse customer environments and work closely with ISV partners to deploy, operate, optimize, and support business-critical applications.

ISCorp is seeking an experienced Senior Systems Administrator
to support our Windows and Linux infrastructure across multiple customer and ISV environments. This is a senior, customer-facing role responsible for system administration, application infrastructure support, virtualization, automation, security, monitoring, documentation, and operational support. The ideal candidate is comfortable working across technologies, can communicate technical issues in clear business terms, and can independently drive issues and projects through resolution.

• Windows Systems Administration:Install, configure, maintain, patch, troubleshoot, and optimize supported Windows Server and desktop operating systems, Active Directory, Group Policy, IIS, and related Microsoft infrastructure.
• Linux Systems Administration:Install, configure, maintain, patch, troubleshoot, and optimize Linux servers, including Red Hat Enterprise Linux and other supported enterprise distributions.
• Application & ISV Support:Deploy, configure, and support ISV applications and their underlying operating-system services, middleware, web components, and application dependencies.
• Application Virtualization & Remote Access:Support technologies such as Citrix, Microsoft Remote Desktop Services, and Parallels RAS, including application publishing, connectivity, and operational troubleshooting.
• Virtualization & Cloud:Administer and support virtualized infrastructure such as VMware and KVM and work with cloud platforms including Azure, AWS, and Google Cloud as required.
• Automation & Scripting:Develop and maintain repeatable automation using Power Shell, Windows command line, Bash, Python, Ansible, and related tools for deployment, patching, validation, and operational tasks.
• Monitoring & Performance:Implement and use monitoring practices and tools to proactively identify availability, capacity, and performance issues across hosted systems and applications.
• Security & Compliance:Apply information-security best practices, system hardening, patching, access controls, vulnerability remediation, and operational controls consistent with company and customer requirements.
• Backup, Recovery & Storage:Support backup and recovery technologies for files, systems, and databases and work with SAN, NAS, and other enterprise storage solutions.
• Networking & Connectivity:Troubleshoot systems-level networking issues involving TCP/IP, DNS, DHCP, VPN, firewalls, and application connectivity in coordination with network teams.
• Database & Middleware Support:Provide systems-level support for Microsoft SQL Server and environments using Progress Open Edge, MySQL/MariaDB, Oracle, Tomcat, and other commercial application components.
• Customer & ISV Engagement:Serve as a senior technical point of contact for customers and ISVs, communicate clearly during incidents and projects, and translate technical issues into non-technical terms when needed.
• Cross-Team
  
  Collaboration:
  
  Work closely with network, database, storage, security, service delivery, product, and project teams to design, implement, troubleshoot, and support…