CAPABILITY 01
Linux server engineering
Build, harden, and maintain RHEL, Ubuntu, and other distributions; services, storage, performance tuning, and scripting.
RHELUbuntuBashsystemd
Home / Capabilities / Linux & Windows Systems Administration
Enterprise operations
Linux & Windows Systems Administration
Stable, patched, and well-documented systems that stay up.
SIS supports the day-to-day engineering that keeps enterprise environments running: Linux and Windows servers, Active Directory, patching, virtualization, monitoring, and configuration management.
Linux server engineeringWindows Server administrationIdentity & directory servicesPatch & vulnerability management
Overview
Stable, patched, and well-documented systems that stay up.
Reliable systems are rarely glamorous — they are the product of disciplined patching, consistent configuration, good monitoring, and clear documentation. SIS brings that discipline to mixed Linux and Windows environments, on-premises and in the cloud.
We emphasize automation and repeatability so environments are secure by default and easy to hand over.
Focus areas
- Linux server engineering
- Windows Server administration
- Identity & directory services
- Patch & vulnerability management
- Configuration management
- Virtualization
What's possible
Capabilities across linux & windows systems administration.
The technical areas SIS can support, and what each makes possible for your mission.
CAPABILITY 02
Windows Server administration
Server roles, IIS, file and print services, updates, and PowerShell automation.
Windows ServerPowerShellIISWSUS
CAPABILITY 03
Identity & directory services
Active Directory, Group Policy, Entra ID (Azure AD), single sign-on, and role-based access.
Active DirectoryGroup PolicyEntra IDSSO / MFA
CAPABILITY 04
Patch & vulnerability management
Scheduled patching with testing and rollback, plus remediation of scanner findings within required timelines.
Patch cyclesSCCM / IntuneVulnerability remediationMaintenance windows
CAPABILITY 05
Configuration management
Desired-state configuration, hardened baselines, and drift detection across fleets.
AnsibleDSCSTIGsCIS baselines
CAPABILITY 06
Virtualization
Hypervisor management, VM lifecycle, templates, and capacity planning.
VMware vSphereHyper-VTemplatesCapacity
CAPABILITY 07
Monitoring & alerting
Health, performance, and log monitoring with actionable alerts and dashboards.
Nagios / ZabbixPrometheusLog aggregationAlert tuning
CAPABILITY 08
Backup & recovery
Backup policies, restore testing, and documented recovery procedures.
Backup policyRestore testingSnapshotsRunbooks
CAPABILITY 09
Core network services
DNS, DHCP, NTP, certificates, and secure remote access.
DNS / DHCPPKI / certificatesNTPRemote access
CAPABILITY 10
High availability & clustering
Load balancing, clustering, and failover design for critical services.
ClusteringLoad balancersFailoverRedundancy
Mission applications
Where it makes a difference.
Representative ways organizations put these capabilities to work.
Steady-state O&M
Ongoing administration, ticket resolution, and maintenance.
Hardening & compliance
Apply STIG/CIS baselines and close audit findings.
Server refresh
Plan and execute OS upgrades and hardware or VM refreshes.
Automation
Replace manual tasks with scripts and configuration management.
Identity cleanup
Rationalize AD groups, stale accounts, and access rights.
Documentation
Produce as-built diagrams, runbooks, and SOPs.
Our approach
A disciplined path from need to outcome.
- 01
Baseline
Inventory systems, configurations, and current risks.
- 02
Stabilize
Address critical patches, failing backups, and monitoring gaps.
- 03
Standardize
Apply hardened, codified baselines.
- 04
Automate
Script routine work and configuration enforcement.
- 05
Sustain
Operate with SLAs, metrics, and continuous improvement.
Tools & technologies
Technology we work with.
We are tool-agnostic and start from what you already use. Representative technologies:
Operating systems
RHEL / CentOS / RockyUbuntuWindows Server 2016–2022Windows 10/11
Automation
BashPowerShellAnsiblePython
Platforms
VMwareHyper-VAWS EC2Azure VMs
Management
Active DirectorySCCM / IntuneServiceNowMonitoring suites
Standards & frameworks
Aligned to the guidance that matters.
- DISA STIGs
- CIS Benchmarks
- NIST SP 800-53 configuration controls
- ITIL service management practices
- Least-privilege access principles
Questions
Frequently asked.
Do you support both on-premises and cloud servers?
Yes. The same discipline — baselines, patching, monitoring — applies whether systems run in a data center or in the cloud.
Can you work to STIG requirements?
Yes. We can apply and document STIG or CIS hardened baselines and support remediation of scan findings.
Do you provide after-hours support?
Coverage models are scoped per engagement, including maintenance windows and on-call arrangements.
Will we get documentation?
Yes — runbooks, as-built configurations, and SOPs are standard deliverables.
Related capabilities
Works well with.
☁
Cloud & Platform Management
SIS helps organizations plan, migrate, automate, and operate cloud and hybrid environments — with infrastructure as code, strong security baselines,…
Explore capability →▣
Network & Enterprise Infrastructure
SIS supports network design, operations, and modernization — LAN/WAN, wireless, secure remote access, segmentation, and monitoring — for reliable,…
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Cybersecurity & Zero Trust
SIS supports security architecture, zero-trust adoption, identity and access management, vulnerability management, and compliance documentation —…
Explore capability →These descriptions explain technology domains SIS is positioned to discuss and pursue; they are not claims of completed contracts, existing products, or specialized certifications.
Let's explore the mission requirements.
Connect with SIS to discuss technical needs, collaboration, or teaming opportunities.