IT Systems Administrator

Company Overview
Kairos Power is a new nuclear energy technology and engineering company whose mission is to enable the world’s transition to clean energy, with the ultimate goal to dramatically improve people’s quality of life while protecting the environment. This goal will be accomplished through the commercialization of the fluoride-salt-cooled, high-temperature reactor (FHR) that can be deployed with robust safety, affordable costs, and flexible operation to accommodate the expansion of variable renewables.
Job Summary
We are seeking an IT Systems Administrator II to support and maintain our cloud, on-premises, and SaaS platforms. This role is responsible for the administration, security, automation, and optimization of enterprise infrastructure across AWS, Microsoft, and on-premises environments.
The successful candidate will partner with business stakeholders and software vendors to support business-critical applications, upgrades, integrations, and implementations while ensuring the reliability, security, and performance of underlying infrastructure and services. The ideal candidate has experience supporting enterprise infrastructure in a regulated environment and embraces an automation-first approach to systems administration, leveraging Infrastructure as Code, scripting, and modern IT operational practices.
Responsibilities
Install, configure, administer, maintain, and optimize infrastructure, services, and applications across AWS, SaaS, and on-premises environments.
Administer and support Microsoft Windows Server, Active Directory, Microsoft Entra ID, Microsoft 365, DNS, DHCP, file services, identity management, and Single Sign-On (SSO) integrations.
Develop, maintain, and improve automation and Infrastructure as Code (IaC) solutions using Terraform, Ansible, CloudFormation, PowerShell, or similar technologies
Monitor system health, performance, security, and availability; investigate and troubleshoot complex infrastructure, cloud, identity, and application issues.
Implement and maintain security controls, patch management, vulnerability remediation, and least-privilege access practices.
Provide technical support for business-critical enterprise applications and collaborate with business stakeholders and software vendors to support operations, integrations, upgrades, and implementations.
Participate in change management activities and support application and infrastructure deployments, migrations, testing, upgrades, and production changes.
Create and maintain technical documentation, standards, procedures, and knowledge base articles.
Provide technical guidance and knowledge sharing to employees and junior IT staff.
Other duties as assigned.
Qualifications
5+ years of progressively responsible experience as a Systems Administrator, Cloud Administrator, Site Reliability Engineer, or similar role in a complex enterprise environment
Strong experience administering Microsoft Windows Server environments, Active Directory, Microsoft Entra ID, Microsoft 365 services, identity management, and SSO integrations,
Working knowledge of Linux server administration in AWS and hybrid-cloud environments
Demonstrated experience administering AWS infrastructure, including services such as EC2, IAM, VPC, Route 53, Systems Manager, FSx, CloudWatch, and related AWS technologies
Strong scripting and automation experience using PowerShell and AWS CLI
Experience supporting SaaS, cloud-native, hybrid-cloud, and on-premises applications and infrastructure
Bachelor's degree in Computer Science, Information Technology, or related field preferred
8+ years of overall IT experience is preferred
Terraform and Ansible experience is preferred