System Administrator, Senior

Phase2 Technology; Washington (District of Columbia); On-site; USD 78,000 - 176,000; Full time

Job summary

Booz Allen Hamilton in Washington, DC seeks a Senior System Administrator to lead enterprise-scale infrastructure and security for mission-critical systems.

The role requires 8+ years of sys/admin experience, TS/SCI clearance, and a strong background in Windows/Linux, databases, and Java stacks. You will mentor teams, improve reliability, and coordinate cross-org efforts.

Compensation ranges from $77,600 to $176,000 per year, with benefits and opportunities for career growth.

Qualifications

• 8+ years in system or network administration
• Experience supporting Windows-based systems and access control management
• Experience with Oracle, PostgreSQL, MongoDB, or similar databases
• Experience with Java, JPA, JAX-RS, Hibernate, Spring, and related Java stack
• Knowledge of RHEL 7/8/9, SELinux and firewall daemons
• Documentation and reporting of system performance
• Active TS/SCI clearance; willingness to take a polygraph
• Bachelor's degree with 10+ years or Master's with 8+ years in Systems Administration
• CompTIA Security+ Certification

Responsibilities

• Ensure current infrastructure is functional and available
• Manage infrastructure, architecture, security, and performance
• Provide customers insight through monitoring and performance management
• Identify problem areas and opportunities for improvement in a mission-critical network
• Mentor team and share expertise to develop new methodologies
• Modernize the network to meet client goals

Skills

System administration

Network administration

Windows administration

Java and web services

Linux administration

Documentation & reporting

Security clearance TS/SCI

Education

Bachelor's degree in Systems Administration

Master's degree in Systems Administration

Tools

Jira

Kanban

Microsoft Office 365

Job description

Job Number: R0246673

System Administrator, Senior

The Opportunity:

Your combination of people skills and system administrator expertise makes you the team hero, solving one problem after another. What if you could use those skills to improve the technology supporting the Department of War? We're looking for a system administrator who specializes in enterprise-level system and network administration and managing secure, multi-domain environments to help our customer deploy and maintain mission‑critical IT infrastructure, strengthen their cybersecurity posture, and enhance the readiness of technology systems.

As a system administrator on our project, you'll ensure the current infrastructure is functional and available and implement the best strategies for updating and patching critical systems. You'll be responsible for managing the infrastructure, architecture, security, and performance of our customer's systems and environments. You'll provide your customers insight into their network through monitoring and performance management.

Your system administrator expertise will be vital as you identify problem areas and opportunities for improvement in a mission‑critical network. You'll help your team better understand the network by turning metrics into information and explaining their meaning.

This is an opportunity to broaden your skillset into areas like risk management and project management applications and methodologies. We focus on growing as a team, so you'll share your expertise through leadership and mentoring as you help the team work through challenges and develop new methodologies. As a systems administrator leader, you'll identify new opportunities to modernize the network, so your clients achieve their goals. Work with us and resolve daily challenges as we improve the reliability, security, and performance of our customer's systems and environments.

Join us. The world can't wait.

You Have:

• 8+ years of experience in a system administration or network administration role

• 8+ years of experience providing Tiers I and II support for Windowsbased systems such as user account and permissions or access control management, printer and device connectivity, basic workstation and network troubleshooting, system log analysis and error resolution, performance remediation, imaging and re‑imaging, system and endpoint updates, and configuration changes
• Experience with managed database systems such as Oracle, Postgres, Apache Solr, PostgreSQL, MongoDB, and OracleDB
• Experience with Java, Java Persistence API (JPA), Java Web Services (JAX-RS), Java Cryptography Extension (JCE), Hibernate, Spring,JavaScript, Apache Ant, Apache HTTPD, and Apache Tomcat
• Experience with Red Hat Enterprise Linux 7, 8, and 9, FIPS mode, SELinux, firewall daemon, file access policy daemon (fapolicyd), and basic system administration
• Knowledge of workflows required to install, configure, administer, manage, and maintain network infrastructure including routers, switches, firewalls, Windows physical and virtual server environments, and operating systems
• Ability to maintain documentation of system configurations and procedures, and provide reports on system performance, incidents, and maintenance activities
• Active TS/SCI clearance; willingness to take a polygraph exam
• Bachelor's degree and 10+ years of experience in Systems Administration, or Master's degree and 8+ years of experience in Systems Administration
• CompTIA Security+ Certification

Nice If You Have:

• Experience as a Systems Administrator in the Department of War or intelligence community
• Experience with cloud computing, digital security, and SQL
• Experience coordinating across multiple IT organizations across echelons, both internal and external, to complete complex coordination or troubleshooting tasks
• Experience using structured troubleshooting frameworks or ticketing systems, such as Jira, Kanban, or Microsoft Office365, to document issues, complete root case analysis, and build a local knowledge base for the team
• Knowledge of systems security procedures and compliance measures, including maintaining and reviewing audit files, and adhering to government policies and industry standards
• Ability to assist in planning and executing IT projects, such as system upgrades, migrations, or new technology deployments
• Possession of problem‑solving and communication skills to interact effectively with both technical and non‑technical users and collaborate across multiple teams and external entities
• Certified Information Systems Security Professional (CISSP), CompTIA Network+, Cisco Certified Network Associate (CCNA), or Cisco Certified Network Professional (CCNP) Certification
• Information Technology Infrastructure Library (ITIL) Certification

Clearance:

Applicants selected will be subject to a security investigation and may need to meet eligibility requirements for access to classified information; TS/SCI clearance is required.

Compensation

At Booz Allen, we celebrate your contributions, provide you with opportunities and choices, and support your total well‑being. Our offerings include health, life, disability, financial, and retirement benefits, as well as paid leave, professional development, tuition assistance, work‑life programs, and dependent care. Our recognition awards program acknowledges employees for exceptional performance and superior demonstration of our values. Full‑time and part‑time employees working at least 20 hours a week on a regular basis are eligible to participate in Booz Allen's benefit programs. Individuals that do not meet the threshold are only eligible for select offerings, not inclusive of health benefits. We encourage you to learn more about our total benefits by visiting the Resource page on our Careers site and reviewing Our Employee Benefits page.

Salary at Booz Allen is determined by various factors, including but not limited to location, the individual's particular combination of education, knowledge, skills, competencies, and experience, as well as contract‑specific affordability and organizational requirements. The projected compensation range for this position is $77,600.00 to $176,000.00 (annualized USD). The estimate displayed represents the typical salary range for this position and is just one component of Booz Allen's total compensation package for employees. This posting will close within 90 days from the Posting Date.

Identity Statement

As part of the hiring process, we will ask you to complete an identity verification process that leverages advanced biometrics and artificial intelligence to ensure authenticity and protect against identity fraud. You are expected to be on camera during interviews and assessments. We reserve the right to take your picture to verify your identity and prevent fraud.

Candidate AI Usage Policy

AI is a part of our daily work at Booz Allen, and we are committed to the responsible and ethical use of AI tools. However, we want to ensure a fair candidate process based on your own skills and knowledge. As part of this commitment, the use of artificial intelligence (AI) or other tools to assist with responses during interviews (whether in‑person or virtual) is prohibited unless permission is explicitly provided.

Work Model

Our people‑first culture prioritizes the benefits of collaboration, whether it occurs in person or virtually. To support engagement and effective communication, employees working virtually are generally expected to have their cameras on during meetings.

• Remote: If this position is listed as remote, there may still be occasions when you are required to work in person at a Booz Allen or customer facility.
• Hybrid: If this position is listed as hybrid, you will be expected to work from a Booz Allen facility frequently, in alignment with leadership expectations and the needs of the role. You may also be required to work from or visit a customer facility.
• Onsite: If this position is listed as onsite, work will primarily be performed at a Booz Allen office or customer facility, where employees will collaborate directly with colleagues and customers as required by the role.

Commitment to Non‑Discrimination

All qualified applicants will receive consideration for employment without regard to disability, status as a protected veteran or any other status protected by applicable federal, state, local, or international law.