Senior Systems Administrator

Hach•Loveland, CO

2d•$95,000 - $105,000•Hybrid

About The Position

Reporting to the Sr. Manager, Application Infrastructure, the Senior Systems Administrator is responsible for the design, implementation, operation, security, and continuous improvement of critical infrastructure services that support Hach and Water Quality operating companies. This role owns core platform services—including DNS, certificate lifecycle management, email authentication, Windows/virtualization platforms, and external security vulnerability remediation—driving operational reliability, compliance, and business continuity. This position is part of the Hach IT – Application Infrastructure department located in Ames, IA or Loveland, Colorado and will be hybrid.

Requirements

Bachelor’s degree in Computer Science, Information Systems, Engineering, or equivalent practical experience.
6+ years of hands-on infrastructure engineering, systems administration, or platform operations experience in a regulated or business-critical enterprise environment.
Deep technical experience with Windows Server, Active Directory, DNS/DHCP, Group Policy, and VMware/virtualization platforms.
Proven hands-on experience with SSL/TLS certificate lifecycle management, PKI workflows, and email authentication standards (DKIM, SPF, DMARC).
Direct experience with external security vulnerability remediation and advanced PowerShell scripting/automation.

Responsibilities

Administering and maintaining Windows Server, Active Directory, VMware/virtualization, storage, and site/datacenter infrastructure platforms.
Owning internal and external DNS services, domain registrar activities, and DNS-based email authentication controls (DKIM, SPF, DMARC).
Managing end-to-end SSL/TLS certificate lifecycle management (CSRs, issuance, renewals, PKI support).
Investigating and remediating external attack surface findings and high-risk vulnerabilities in partnership with SecOps and Global Security teams.
Developing PowerShell scripts to automate repetitive infrastructure tasks and supporting backup and disaster recovery operations.