Cornerstone Defense | Technically Innovative Solutions

Location: Colorado Springs , Colorado
Type: Contract
Job #3741

Job Title: Unix Engineer
Job Location: Peterson Space Force Base, Colorado Springs, CO
Clearance: Secret
Schedule: 9/80 Onsite
Salary: $125K – 155K
Certification Requirement: Must hold a DoD 8570 IAT Level II certification (e.g., Security+, CASP, CAP, CISSP) prior to start

Company Overview:
Cornerstone Defense is the Employer of Choice within the Intelligence, Defense, and Space communities of the U.S. Government. Realizing early on that our most prized assets are our employees, we continually focus our attention on improving the overall work/life experience they have supporting the mission. Our Team is pushed every day to use their industry leading knowledge to provide end-to-end solutions to combat our nation’s toughest and most secure problems. If you are looking for a place to not only be professionally challenged, but encouraged and supported by a company that cares, don’t look any further than Cornerstone Defense.

Position Overview:
We are seeking a Unix Systems Engineer to provide hands-on systems administration and engineering support at Peterson SFB. This role requires expertise across both Solaris and Linux environments, supporting mission-critical systems through daily maintenance, patching, troubleshooting, automation, and cyber compliance. You’ll collaborate with cross-functional teams to ensure system integrity, security, and operational excellence across a dynamic enterprise infrastructure.

Key Responsibilities:

Perform daily systems administration tasks including monitoring, patching, performance tuning, and help desk support.
Build, configure, and maintain both physical and virtual Solaris and Linux systems.
Develop and maintain administrative automation scripts using tools such as Perl, Python, PowerShell, or VBScript.
Manage and troubleshoot complex file systems (ZFS, UFS), including partitioning and resizing.
Provide operational support for VEEAM storage appliances.
Configure and manage LDAP clients and servers; maintain directory services infrastructure.
Integrate Solaris systems with Active Directory for authentication and access control.
Configure and manage Solaris virtualization using PDOM/LDOM technologies.
Apply cybersecurity best practices, including STIG implementation, vulnerability remediation (Nessus/ACAS), and maintaining cyber compliance documentation.
Conduct periodic evaluations of COTS software to ensure relevance, compliance, and supportability.
Support development, integration, and deployment of periodic system releases.
Create and maintain system documentation, architecture diagrams, and engineering design documents.
Provide technical support and root cause analysis for system-related issues.

Basic Qualifications:

IAT Level II certification (Security+, CASP, CAP, or CISSP) in accordance with DoD 8570.01-M.
7+ years of Unix/Linux systems administration experience in enterprise or secure environments.
Hands-on experience with Solaris and Linux OS administration.
Strong scripting experience with at least one language: Python, Perl, PowerShell, or VBScript.
Experience with managing file systems such as ZFS and UFS.
Knowledge of LDAP management and integration.
Familiarity with system hardening, STIGs, and vulnerability remediation tools (e.g., Nessus, ACAS).

Preferred Qualifications:

Experience with Solaris virtualization (PDOM/LDOM).
Familiarity with Active Directory integration in Unix environments.
Experience supporting and managing backup solutions such as VEEAM.
Background working in DoD or classified environments.
Strong troubleshooting, documentation, and communication skills.
Ability to work both independently and within a team setting to solve complex technical problems.

Company Benefits:
Cornerstone Defense offers a comprehensive list of benefits, designed to give employees and their families several options to choose from when selecting benefits that best fit their needs. These offerings include not only a full suite of the traditional Medical/Dental/Vision insurances, but also a number of other benefits and perks to include, but not limited to: A 401(K) plan with a company match, tuition and training assistances, paid vacation/leave, a fitness reimbursement program, college savings plan, commuter benefits, financial advisory services, flex spending accounts, health savings accounts, STD/LTD coverage, life and AD&D insurance, employee assistance programs, life financial planning assistance, and legal resources.