Source Job

US

  • Administer and secure enterprise Red Hat Linux and Windows infrastructure, ensuring reliability and compliance.
  • Perform STIG/SCAP compliance, ACAS vulnerability scanning, and PKI certificate management.
  • Monitor performance, apply patches, and collaborate with teams to resolve technical issues.

Windows Server AWS PKI

20 jobs similar to Senior Systems Engineer – Infrastructure & Security

Jobs ranked by similarity.

$92,075–$158,138/yr
US

  • Design and implement security controls for AWS infrastructure and mission applications, including threat modeling and hardening.
  • Apply STIGs and RMF/NIST 800-53 controls, integrate security scanning into CI/CD, and remediate vulnerabilities.
  • Collaborate with ISSO/ISSM and engineering teams to document implementations and support ATO and continuous monitoring.

LMI is a digital solutions provider dedicated to accelerating government impact with innovation and speed, bringing commercial-grade platforms and mission-ready AI to federal agencies. Headquartered in Tysons, Virginia, LMI serves the defense, space, healthcare, and energy sectors with a focus on agility and collaboration.

US

  • Administer AWS GovCloud and Linux infrastructure for a federal client's telecommunications systems.
  • Support AWS Connect, IAM, CloudWatch, and automation through Infrastructure as Code.
  • Participate in SAFe Agile ceremonies and an on-call rotation for mission-critical uptime.

They are a rapidly growing federal contractor delivering secure cloud and telecommunication infrastructure for federal clients. The company focuses on mission-critical systems and maintains a collaborative, agile work culture.

Portugal

  • Provide first-level operational support and monitor infrastructure alerts for Linux and Windows systems.
  • Configure, maintain, and troubleshoot web servers, load balancers, TLS certificates, and database environments.
  • Work rotating shifts, including nights and weekends, to ensure service stability and reliability.

The company is a technology organization seeking a Systems Engineer for their cloud adoption and IT operations team. They promote a collaborative culture with continuous learning and professional development.

US

  • Ensure stable operation of computer software systems and network connections supporting the DLA Disposition Integration Web (DIW) Program Office.
  • Apply advanced technical knowledge of application networking, load balancing, fault tolerance, and vulnerability management.
  • Automate repeatable administrative tasks using PowerShell, Bash, Python, configuration management, or infrastructure-as-code tools.

Zantech is a dynamic Woman Owned Small Business focused on providing complex, mission-focused solutions with a proven track record of outstanding customer performance and high employee satisfaction. The company strives for excellence, values long-term relationships, and offers a fast-paced and exciting work environment.

COTS Engineer

DMI
US

  • Operate, maintain, and enhance enterprise business applications across Windows and RHEL environments, including virtualized and AWS-hosted systems.
  • Plan and execute system, database, and application upgrades while monitoring IT systems for availability and performance.
  • Troubleshoot complex application issues, perform root-cause analyses, and support compliance with security and operational standards.

DMI is a leading provider of digital services and technology solutions, headquartered in Tysons Corner, VA. Recognized as a Top Workplace, DMI delivers secure, efficient, and cost-effective managed IT services to public sector and commercial clients worldwide.

US

  • Automate Windows Server configuration, deployment, and security hardening in a federal AWS GovCloud environment.
  • Support migration from Windows Server 2016 to 2019/2025 using PowerShell, Ansible, and infrastructure-as-code tools.
  • Work fully remotely within core Eastern Time hours, collaborating with architects and engineering teams in a DevSecOps environment.

Jobgether is an AI-powered job matching platform that connects candidates with hiring companies through objective application reviews. It uses technology to support recruitment while relying on human judgment for final decisions.

Global

  • Manage and support enterprise Windows Server infrastructure, including Active Directory, DNS, DHCP, Group Policy, and virtualization.
  • Automate administrative tasks with PowerShell and handle server builds, patching, hardening, and migrations.
  • Ensure security, high availability, backup/DR, and 24x7 operational support across VMware/Hyper-V environments.

We are an organization hiring an experienced Windows Engineer to manage and support enterprise Windows Server infrastructure, including Active Directory, virtualization, and high-availability environments. Our team operates a 24x7 enterprise environment with a focus on automation, security, and operational excellence.

Global

  • Provide 24/7 operational support for Linux, Windows, and cloud-based infrastructure.
  • Monitor system integrity, perform backups, resolve incidents, and maintain documentation.
  • Administer cloud platforms, virtualization, and automation using scripting tools.

Miratech is a global IT services and consulting company that supports digital transformation for large enterprises. It retains nearly 1,000 full-time professionals across 25+ countries with a culture of Relentless Performance.

US

  • Administer GCP and AWS cloud infrastructure with a focus on security and compliance.
  • Manage containerized environments, identity protocols, and CI/CD workflows.
  • Collaborate with scientists and engineers to support agentic AI and scientific SaaS platforms.

The company operates advanced cloud-hosted research applications, agentic AI frameworks, and scientific SaaS platforms. Working in a fully remote, high-tech environment, their cross-functional teams focus on transitioning research prototypes into production-ready services.

US

  • Deliver Gold Support through Tier 3 engineering and solutions architecture for Hypori infrastructure.
  • Integrate and maintain F5 TLS Proxy, Nutanix, PKI, and Hypori Halo server environments.
  • Support disaster recovery, patching, health monitoring, and security vulnerability remediation.

Hypori is a high-growth cybersecurity SaaS company making secure mobile access easy with zero data on the endpoint. Backed by $55M, it is expanding into regulated markets with a security-first, customer-focused culture.

US Unlimited PTO

  • Design, harden, and defend containerized application infrastructure across edge and cloud environments.
  • Lead threat modeling, vulnerability management, and security reviews to support mission-critical systems.
  • Own provisioning, secrets management, and security controls for systems operating in denied or disconnected environments.

CX2 is a next-generation defense technology company building AI-enabled hardware and software platforms to detect, disrupt, and defend the electromagnetic spectrum. Backed by leading defense investors and led by founders from Meta, SpaceX, Epirus, and the DoD, the company values high responsibility and autonomy.

US

  • Design and maintain secure, scalable AWS infrastructure supporting a healthcare credentialing platform.
  • Optimize Linux, Windows, container platforms, Nutanix, email relay, and SSL/TLS systems.
  • Drive automation, security, compliance, and reliability across cloud and on-premises environments.

The company operates a healthcare credentialing platform aimed at improving provider data quality and compliance. It fosters a collaborative, small-team culture focused on innovation, technical ownership, and professional growth.

US

  • Design, build, and operate secure AWS infrastructure following the Well-Architected Framework.
  • Serve as Linux SME and administer Windows Server, Nutanix, and container platforms like Rancher and ECS Anywhere.
  • Own SMTP relay, SSL/TLS certificate lifecycle, and support HITRUST and SOC 2 compliance.

Verisys transforms provider data, workforce data, and relationship management for healthcare and life sciences. Serving more than 400 organizations, it is the largest outsourced credentials verification organization in the US and fosters a culture of innovation, community impact, and career growth.

Latin America

  • Own corporate IT infrastructure, Microsoft 365, and identity management.
  • Administer Windows/Linux servers, networking, and edge connectivity.
  • Collaborate with engineering and DevOps to troubleshoot and optimize systems.

They build connected edge solutions for technology products. The team is fully remote, async-first, and values independent, self-driven work.

Unlimited PTO

  • Drive security errata, CVE scoring, and affectedness analysis for Linux operating system components.
  • Design and implement compliance profiles (STIG, DIS) using OpenSCAP and Ansible automation.
  • Apply proactive OS security measures like SELinux, build flags, and LKRG while keeping systems usable.

CIQ builds enterprise infrastructure that powers the world's most demanding workloads, from the operating system layer through AI infrastructure, high-performance computing, and cloud-native orchestration. They are the founding support and services partner of Rocky Linux, and their team is made up of builders, operators, and open source practitioners.

$95,200–$160,800/yr
US Unlimited PTO

  • Collaborate with U.S. government agencies and public sector customers to resolve complex GitLab issues in secure, air-gapped environments.
  • Perform deep technical investigations using Linux tooling and GitLab internals, tracing issues across infrastructure, application, and code paths.
  • Create clear documentation, build internal support tools, and participate in on-call rotations for compliance-focused deployments.

GitLab is the intelligent orchestration platform for DevSecOps, helping organizations increase developer productivity and accelerate digital transformation. Trusted by more than 50 million users and over 50% of the Fortune 100, GitLab fosters a high-performance, inclusive culture driven by values and continuous knowledge exchange.

  • Process security requests, access management, and vulnerability assessments.
  • Identify and help mitigate security issues, misconfigurations, and vulnerabilities.
  • Support identity and access management and assist with incident response.

Quadcode is a fintech company delivering advanced financial products, including a trading platform offered as SaaS to other brokers. We're a global team of 500+ creative and tech-driven people with a positive and friendly atmosphere.

UK

  • Maintain, monitor, and support production infrastructure across Windows, Linux, AWS, VMware, and physical data centers.
  • Administer AWS environments, manage IAM users, DNS, and server resources, and resolve medium-to-complex technical incidents.
  • Participate in on-call rotation and collaborate with stakeholders to communicate events and drive continuous improvement.

NICE delivers AI-powered cloud and digital solutions for customer experience, financial crime prevention, and public safety, serving 25,000+ global businesses. With over 8,500 employees in 30+ countries, it fosters an ambitious, high-performance culture that challenges limits.

US

  • Develop and maintain GitLab CI/CD pipelines, including reusable jobs, parent/child pipelines, and integrated security testing.
  • Build and maintain AWS GovCloud infrastructure using Terraform and Ansible, focusing on secure, resilient, and maintainable solutions.
  • Automate security controls, troubleshoot complex infrastructure issues, and provide technical guidance across teams.

LMI is a digital solutions provider dedicated to accelerating government impact with innovation and speed, serving federal agencies across defense, space, healthcare, and energy. Headquartered in Tysons, Virginia, LMI focuses on agility and collaboration to deliver impactful results and drive lasting value.

EMEA

  • Identify and mitigate security gaps in infrastructure to improve resilience and reduce risk.
  • Harden infrastructure by applying secure-by-default designs across data, endpoints, tools, and processes.
  • Collaborate with Platform, Engineering, and other Security teams to provide guidance and ad hoc support.

Zapier builds and uses automation to make work more efficient, creative, and human. They are a remote-first, mission-driven company that values diversity, inclusion, and belonging.