System Administrator II

Accelint Holdings LLC

San Diego (CA)

On-site

USD 110,000 - 140,000

Full time

3 days ago

Be an early applicant

Application generator

Don’t send a generic resume — generate a resume and cover letter tailored to this exact role.

Get past ATS filters

Benefits offered by this job

Paid Time Off

Company Holidays

401k Matching

Health Insurance (Medical, Dental &amp

Job summary

Lyntris, a defense technology company, is seeking a System Administrator II for on-site work in San Diego, CA. The role involves managing AWS services, IaC, and security compliance to support mission-critical systems.

Requirements include Security+ and 2–5 years of system administration experience across Linux/Windows, virtualization, and cloud infrastructure. Enterprise IT focus with CI/CD support is expected.

Qualifications

Active U.S. security clearance or ability to obtain one.
2–5 years in system administration across Linux, Windows, and virtualized environments.
Experience with AWS, VPCs, and information assurance controls (STIG/ACAS).

Responsibilities

Provision, configure, and sustain AWS services (EC2, S3, VPC, EventBridge).
Monitor and manage assets within AWS VPC using monitoring tools.
Develop and run IaC with Ansible Playbooks.
Document configurations, troubleshooting steps, and implementations.
Execute BTFs to validate environment performance against requirements.
Maintain patches and STIG compliance across systems.
Scan for vulnerabilities and remediate with ACAS.
Administer Windows and Linux servers/workstations and provide user support.
Support CI/CD deployment and operations for production apps.
Manage user/group permissions, GPOs, and security policies.

Skills

Linux

Windows Server

VMware

Cloud AWS/Azure

Scripting

Security+ Certified

Active Directory

IA Compliance

Automation

Tools

Ansible

Terraform

CloudFormation

Docker

Kubernetes

OpenShift

ACAS

Job description

About this position

Lyntris is a defense technology company that connects sensing to action across the connected battlespace. Lyntris brings together the talents of Accelint and Vitesse teams under one mission, with each contributing deep expertise within their domain. Combining differentiated hardware, software and mission expertise, Lyntris helps customers sense threats, make sense of complex conditions and act with greater speed, precision and confidence in contested environments.

Lyntris supports U.S. and allied defense organizations across every branch — including Navy, Army, Air Force, Space Force and allied partners — spanning strategic, operational and tactical missions and every domain: Space, Air, Land, Sea and Cyber. With more than 200 active defense programs, Lyntris works at every level of the mission, from national command authority to the tactical edge.

Solutions are designed by operators who understand the mission, engineered for the conditions that degrade or defeat standard systems, and built on an open, modular architecture that integrates into existing programs without requiring them to start over. Lyntris moves faster than the traditional defense cycle — with integrated design, build and test capabilities in-house — and delivers systems that sustain and endure long after initial fielding.

Job Description

System Administrator II
Full time
Onsite

Duties and Responsibilities

Responsible for provisioning, configuring, and sustaining AWS services such as but not limited to EC2, S3, VPC, and AWS Event Bridge.
Utilizing resource monitoring tools to manage and report on assets within AWS VPC.
Experience developing and executing Infrastructure as Code (IaC), primarily using Ansible Playbooks
Create and maintain clear, concise, and comprehensive documentation for technical work performed, including system configurations, troubleshooting steps, and project implementations
Execute baseline BTFs (Build Test Frameworks) to validate environmental functionality and ensure system performance aligns with specified requirements
Maintain system patches, as well as operating system, in accordance with Security Technical Implementation Guide (STIG) compliance.
Scan systems and assist the team in remediating vulnerabilities using ACAS.
Administrate, monitor, troubleshoot, and maintain Window or Linux-based workstations, enterprise IT servers, systems software requirements, and analytical support.
Provide guidance, assistance, coordination, and follow-up on complex problems and ensure resolution.
Familiar with automated deployment and CI/CD workflows to assist with application developers and operations to support production applications.
Perform server administration tasks, including user/group administration, security permissions, group policies, research event log warnings and errors, resource monitoring and resolution, while ensuring system architecture components work together seamlessly.

Required Qualifications

Currently holds an active U.S. national security clearance OR can obtain one (process is facilitated through the company upon hire; to learn more about the security clearance process, please access this link ).
CompTIA Security+ Certified (or able to secure certification upon hire)
2-5 years system administration experience related to:
- Linux operating systems (i.e., RHEL, CentOS)
- Windows Server Operating Systems (i.e., 2020, 2022)
- Virtual machines (i.e., VMware, VirtualBox, Hyper‑V)
- Cloud computing infrastructure (i.e., Amazon AWS, Microsoft Azure)
- Information Assurance Compliance (i.e., STIGs, ACAS, ENS/HBSS)
- Automation and Scripting (i.e., Bash, Python, PowerShell, etc.)
Experience with providing user support

Preferred Qualifications

Cloud Certification (i.e., CompTIA Cloud +, ISC2 CCSP, VMWare Cloud Service Solutions)
Containerization (i.e., Docker, Kubernetes, OpenShift)
Infrastructure-as-Code (i.e., Ansible, Terraform, CloudFormation)
Identity management administration (i.e., Active Directory, AWS IAM, OpenAM, Keycloak)
Cloud infrastructure management tools (i.e., AWS Systems Manager, Azure Monitor)

Clearance Requirements

Some positions will require access to U.S. National Security information. Positions that require this access will be required to receive and maintain a U.S. government personnel security clearance (PCL). In order to qualify for this position, the candidate must be a US Citizen and either currently possess this National Security eligibility or be able to complete the investigation application process with a favorable determination and maintain that eligibility throughout their employment. To learn more about the security clearance process please access this link .

EEOC & Know Your Rights

Lyntris companies are Equal Opportunity Employers. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, age, disability, status as a protected veteran or any other status protected by applicable federal, state, and local law. We ensure that all employment decisions, including hiring, promotion, compensation, and other terms and conditions of employment, are based on merit, qualifications, and business needs. For more information about your rights, please review the "Know Your Rights" poster from the Equal Employment Opportunity Commission (EEOC). Know your Rights: English Spanish

Pay Scales & Benefits

The listed pay scale reflects the broad, minimum to maximum, pay scale for this position for the location for which it has been posted and is not a guarantee of compensation or salary. Other compensation considerations may include, but are not limited to, job responsibilities, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, or other applicable factors.

Benefits include…