Senior Remote Linux System Administrator Jobs in Carol Stream, IL

The Sr. Cloud Security Engineer (Sr. CSE) is a hybrid cloud and security engineering role responsible for the hands-on remediation of infrastructure and cloud vulnerabilities, ensuring cloud and infrastructure resourcesmaintaincompliance with established policies and Minimum-SecurityBaselines (MSBs), and reporting the organization's current compliance posture. The Sr. CSE will partner with the Security team to define, author, andmaintaincloud security policies-keeping pace with evolving industry trends and regulatory requirements. This role will also activelyparticipatein audit activities, including evidence gathering, reporting, and cross-functional collaboration with Compliance, Legal, and IT teams.

Duties & Responsibilities:

Vulnerability Remediation & Security Operations

• Perform hands-on remediation of infrastructure and cloud vulnerabilities, driving issues to closure within established SLAs and policy requirements

• Operate and administer vulnerability management and cloud security posture management (CSPM/DSPM) tooling-managing scan coverage, remediating findings, and reporting on SLA adherence

• Identify, prioritize, and remediate cloud misconfigurations and security posture gaps across the organization's Azure subscriptions and infrastructure

• Implement andvalidatesecurity controls across cloud-native services, IaaS, PaaS, and container-based workloads

• Maintain and enforce secure configurations across firewalls, network security components, application delivery infrastructure, and compute platformsin partnership withthe Security Team

• When needed,assistwithprivileged credential hygiene, certificate lifecycle, and secrets governance across the environment

• Support the hardening of Windows and Linux server environments through configuration management and compliance-as-code practices

• Maintain awareness of known and emerging vulnerabilities across the full technology stack-cloud services, OS platforms, network components, and application runtimes

Compliance, Policy & Reporting

• Monitor and report the organization's compliance posture against established security policies, baselines, and regulatory frameworks

• Partner with the Security team to define, author, andmaintaincloud and infrastructure security policies-keeping pace with evolving industry trends and regulatory requirements

• Review and update existing policies on a regular cadence to reflect changes in the cloud environment and threat landscape

• Produceaccurate,timelycompliance posture reports for leadership-covering baseline adherence, vulnerability SLA performance, and remediation progress

• Coordinate andassistin evidence collection and audit maintenance for internal and external organizational assessments, including regulatory audits and third-party risk reviews

• Respond to findings from audits, security questionnaires, and internal/external scanning or penetration testing

CI/CD Pipeline & Infrastructure Security

• Partner withSoftware Engineeringand App Securityteams to embed security into CI/CD pipelines and deployment workflows-including secret scanning, least-privilege deployment identities, and secrets management integration

• Review and advise on Infrastructure-as-Code (IaC) implementations from a security perspective, ensuring patterns align with security baselines and organizational standards

• Support secure configuration management across server and cloud environments

• Ensure PKI and certificate management practices aremaintainedacross the environment-including TLS/SSL lifecycle, renewal processes, and certificate inventory

Technical Leadership & Mentorship

• Serve as an informal technical leader and security subject matter expert across Cloud Engineering, Platform Engineering, and adjacent teams

• Mentor engineers on security best practices, secure design patterns, and compliance requirements-elevating security competency across the department without direct people management responsibilities

• Contribute to architecture and design reviews, providing a security lens on cloud platform decisions in partnership with the Cloud Architect

Cross-Team Collaboration

• Cloud Engineering & Platform Engineering-consult on secure architecture, container platform hardening, network segmentation, and pipeline security practices

• Identity & Access Management (IAM)-partner on identity governance, privileged access management, and access control policy enforcement

• Incident Response / Vulnerability Management-collaborate with the SecurityDetection & Response teamon vulnerability prioritization, SLA tracking, remediation coordination, and incident response activities

• Audits & Assessments-provide technical support for evidence gathering, compliance posture reporting, and audit response

• Application Development Teams-consult on security requirements for cloud-native application platforms, ensuring developer environments are built securely from the ground up

Additional Requirements:

As part of the evaluation process, candidates who progress beyond the initial screening will be required to complete a formal technical assessment to validate coding proficiency and technical competency.

Education & Experience

• 10+ years of experience in cloud engineering, infrastructure, or security engineering-withdemonstratedhands-on security work, not just advisory

• Bachelor's Degree in Computer Science, Software/Computing Engineering, Information Security, or related field-or equivalent experience

• Technical certifications preferred: AZ-500, SC-100, SC-200, AZ-104, or equivalent cloud/security certifications

• Experience working in regulated industries (Financial Services, Insurance, or Health-Tech preferred)

• Familiarity with compliance frameworks: NIST, HIPAA,PCIandMinimum SecurityBaselines (MSBs)

Skills & Abilities

Hands-on experience or significant exposure to the following services and concepts:

Cloud Platform-Azure

• Networking & Security: Virtual Networks (VNETs) and peering, NSGs, UDRs, Private Endpoints, Azure Firewall, Application Gateways (including WAF-OWASP ruleset configuration, Detection vs. Prevention mode), ExpressRoute, VPN Gateways, and Azure Bastion

• Compute & Containers: Virtual Machines, VM Scale Sets, AKS (Kubernetes), and Container App Environments-including cluster hardening, network policy enforcement, workload identity, and Azure Policy for Kubernetes

• Identity & Access: Active Directory (on-prem, hybrid Entra Connect sync), Microsoft Entra ID, Privileged Identity Management (PIM), Conditional Access policy design and enforcement, Azure RBAC (including custom role design), and Entra ID Protection

• Security & Compliance Tooling: Microsoft Sentinel, Microsoft Defender for Cloud (Defender for Containers, Defender for Servers, Defender CSPM), and Azure Policy

• Monitoring & Observability: Azure Monitor-KQL, alert rule configuration, log-based queries, and action group integrations; familiarity with Log Analytics Workspace architecture and log ingestion patterns at scale

• Secrets & Certificates: Azure Key Vault and Key Vault CSI Secrets Store driver for AKS

• Storage & Recovery: Storage Accounts, Backup Vault, and Azure Site Recovery

• Virtual Desktop: Azure Virtual Desktop (AVD)

Security Tooling

• Rapid7-vulnerability management and scanning (InsightVMorInsightIDR); scan configuration, reporting, and SLA tracking

• Wiz and/or Orca Security-CSPM/DSPM platform experience; cloud misconfiguration identification, prioritization, and remediation workflows

• Microsoft Sentinel-SIEM administration, analytics rule management, and data connector configuration; familiarity with security log feeds from edge and email security platforms preferred

• Microsoft Defender for Cloud-Defender plans (Servers, Containers, CSPM), agentless scanning, and security recommendation management

• Datadog-log management, infrastructure monitoring, and security-adjacent alerting

• Identity, Access & Privileged Access Management

• DelineaSecret Server (Thycotic)-PAM administration, privileged credential vault management, and access policy configuration

• Active Directory + Entra ID-hybrid identity, Entra Connect sync, group policy (GPO), DNS, and DHCP administration

• Conditional Access, PIM, and RBAC-policy design, enforcement, and least-privilege access models at enterprise scale

• Microsoft Intune-device compliance enforcement as part of a Zero Trust security posture

• Certificate Management-PKI, TLS/SSL lifecycle management, certificate inventory, and renewal processes

Network & Perimeter Security

• Cloudflare (Enterprise)-CDN, WAF, DDoS protection, and DNS proxy configuration and management

• Network routing and VPN-hub-and-spoke topology, route tables, ExpressRoute, and VPN Gateway

• Cisco ASAv-virtualfirewallconfiguration and management

• DNS, DHCP, and Group Policy-enterprise-scale administration in hybrid environments

• DevOps,IaC& Pipeline Security

• Azure DevOps (ADO)-CI/CD pipeline security, build agent management, and secure pipeline design

• GitHub / GitLab-source control security, branch protection, secret scanning, and pipeline hardening

• Infrastructure-as-Code (IaC)-Terraform, ARM templates, or Bicep-with a security-first approach to cloud deployments

• CHEF-configuration management and compliance-as-code for server fleet hardening and baseline enforcement

• Endpoint & Server Platforms

• Windows Server-administration, hardening, security baseline enforcement, and Group Policy management

• Linux Server-administration, hardening, and security baseline enforcement across enterprise server fleets

• Microsoft 365 Suite-Exchange, SharePoint, Teams, and Intune-security configuration and administration

Frameworks & Compliance

• Familiarity with NIST, HIPAA, and organizationalMinimum SecurityBaselines (MSBs)

• Understanding of Zero Trust architecture principles and how they apply across identity, network, and workload security

• Familiarity with PCI-DSS scoped environment security requirements preferred

• Experienceoperatingin regulated industries (Financial Services, Insurance, or Health-Tech)

Experience with or exposure to the following developer runtimes and technologies is a plus, as this role will consult on security posture within environments built on:

• ASP.NET,.NET,Java (JBoss / Hibernate / JMS),gRPC, Redis, SQL Server