Systems Administrator, Sr.

Systems Administrator, Sr. The Bison Group LLC Fort Belvoir, VA Job Details Full-time 17 hours ago Qualifications TS/SCI with Polygraph CompTIA Security+

Full Job Description Description:

Bison Group - Mission First. People Always. At Bison Group, we're more than a defense contractor — we're a people-focused small business with a strong culture built on trust, respect, and impact. We value every member of the team, foster open communication without the layers of a big corporation, and stand firmly behind our commitment to the veteran community through real, tangible action. When you join Bison Group, you're not just filling a role — you're stepping into a mission-critical environment where your work directly supports our federal partners, and national security objectives. Here, your skills are recognized, your growth is encouraged, and your contributions have a clear purpose.

Responsibilities:

Access Management & Security:

Fulfill AWS S3 bucket access requests from data custodians, ensuring proper authorization and data security. Create and manage IAM roles and policies to enforce strict access control principles and maintain a secure cloud environment. Create, rotate, and manage IAM user secret & access keys in accordance with the company's 90-day key rotation policy.

Monitoring & Troubleshooting:

Proactively monitor the health and performance of our systems and websites using tools like CloudWatch, Kibana/Elasticsearch, and Tableau, ensuring optimal functionality and identifying potential issues. Troubleshoot and resolve system issues by analyzing logs on EC2 Linux instances within AWS. Assist in troubleshooting network, DNS, and storage issues, and make recommendations for cost-saving options and growth.

Operational Support & Collaboration:

Work on tickets in a timely manner, adhering to Service Level Agreements (SLAs) and providing efficient support to internal stakeholders. Assist DevOps and development teams during deployments, ensuring smooth and successful releases. Create SNS topics and configure S3 bucket notifications based on customer requests, enabling timely alerts and automated workflows. Work closely with various teams across the organization, including security, development, and operations, to address AWS infrastructure requests and ensure alignment with best practices. Document processes and contribute to the creation and maintenance of Standard Operating Procedures (SOPs) to improve team efficiency and knowledge sharing.

Independence & Reliability:

Execute tasks with minimal technical supervision, embrace reliability constraints, and proactively contribute improvements to the platform. Demonstrate commitment to teamwork, contributing to the betterment of the team and fostering a collaborative environment.

On-Site Availability:

Maintain on-site availability Monday through Friday, adhering to the required work schedule. Proficiency with

Tools:

Demonstrated experience using collaboration tools such as ServiceNow, Jira, and Confluence for incident management, project tracking, and knowledge sharing.

Requirements:

Clearance Required:

TS SCI w/ CI scope

Poly Clearance Required:

TS SCI w/ CI scope

Poly Minimum Education:

Bachelor's degree plus 5 years experience, Associates degree plus 7 years experience or a minimum of 8 years of experience, in a related field

Minimum Years of Experience:

Bachelor's degree plus 5 years experience Associates degree plus 7 years experience, or a minimum of 8 years of experience, in a related field

Required Certifications:

(if needed) CompTIA Security+

Preferred:

(nice to have but not required) AWS Certified Cloud Practitioner AWS Certified Solutions Architect -

Associate AWS Expertise:

5+ years of hands-on experience administering and managing systems within the AWS cloud environment.

Linux Proficiency:

3+ years of experience as a Linux system administrator, with deep understanding of OS internals, networking, and security.

Ticketing Systems:

5+ years of experience working with and managing tickets in enterprise ticketing systems (e.g., ServiceNow, Jira).

Cloud Troubleshooting:

Proven ability to troubleshoot and resolve issues in complex cloud environments (5+ years experience). Bison Group is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, national origin, disability status, protected veteran status, or any other characteristic protected by applicable law.