Job Description

FRCS/OT SYSTEM ADMINISTRATOR

Concurrent Technologies Corporation

Camp Butler, Okinawa, Japan

Minimum Clearance Required: Secret

Clearance Level Must Be Able to Obtain: Secret

As a trusted partner and leader in providing energy and sustainability consulting services to the federal government, Concurrent Technologies Corporation (CTC) understands the increasing complexity of achieving energy security and data management in a changing world. As part of the Energy, Resilience and Sustainability (ERS) Division, you will collaborate with experts to provide comprehensive policy, planning, and implementation services to deliver solutions that address critical infrastructure resilience and security, and data management issues and support the military mission, while reducing environmental impacts. We take our role seriously, as our efforts ensure our installations and assets are prepared in any operating environment, present and future.

The ERS Division is seeking a qualified and proactive candidate to provide Information Technology (IT), Operational Technology (OT) and Cybersecurity support. The candidate will work with a small team to secure and defend Facility Related Control Systems supporting Marine Corps critical infrastructure.

The FRCS/OT System Administrator will report directly to the ERS Division Director and build on the team's knowledge of Facility Related Control Systems Architecture, Engineering and Cybersecurity. This is an onsite position working directly with the customer. Some travel may be required.

Key Responsibilities:

• Perform computer network defense assessments, including threat intelligence, Risk identification, vulnerability management, and security operations.
• Assess compliance using NIST, DoD, USMC and other security requirements to include the CNSSI 1253 Security controls and DISA STIGs/SRGs
• Continuously assess the cybersecurity posture of assigned sites by verifying scans, reviewing policies and procedures, and making recommendations for improvement.
• Conduct assessment activities on both FRCS/OT and IT according to documented requirements (i.e. STIG/SRG) and scan using tools such as ACAS, Nessus, and Lansweeper.
• Analyze assessment data to identify system deficiencies and vulnerabilities.
• Provide remediation recommendations to address vulnerabilities.
• Drive continuous improvement of computer network defense capabilities through the evaluation and adoption of new technologies, tools, and processes.
• Stay abreast of emerging cyber threats, attack techniques, and industry best practices in computer network defense. Assess their potential impact on the organization and make recommendations for proactive measures.
• Participate in conferences, workgroups, meetings and other required events.
• Travel to supported installations and required locations to provide related cybersecurity expertise.

Basic Qualifications:

• Bachelor's Degree in Computer Science or IT related field and at least 4-6 years of experience performing System Administration.
• Minimum of 3 years of relevant experience in computer network defense, cybersecurity, conducting assessments, and vulnerability scanning using tools like ACAS, Nessus, etc.
• Minimum of 3 years experience in DOD security controls to include DISA Secure Technical Implementation Guidelines (STIG), Security Content Automation Protocol (SCAP) system compliance, baselining and automation in accordance with DOD Risk Management Framework (RMF).
• Strong problem-solving skills and the ability to work effectively in a team environment.
• DoD 8140 compliant
• Minimum of 3 years experience Active Directory, Group Policy, Windows Workstation and server administration
• Minimum of 3 years experience performing cybersecurity vulnerability and patch management. 
• Ability to obtain and maintain a Department of Defense (DoD) Common Access Card (CAC).
• Ability to maintain a US Government Secret security clearance.

Preferred Qualifications:

• Experience with USMC IT/OT/FRCS Systems and cybersecurity processes
• PowerShell scripting
• SYSLOG & SIEM
• IIS and SQL Server administration
• Configuration Control/Change management
• POA&M documentation creation and management
• MCCAST and/or eMASS Experience
• Certifications: CISSP, CISA, CISM, CEH, GICSP

Why CTC?

• Our teams at CTC are passionate and thrive on collaboration in a high-paced team environment
• When we encounter a difficult problem, we have a variety of talented and diverse employees that work together to solve the toughest challenges
• Competitive salary and benefits package
• Although our work at CTC is extremely important, we also recognize the need for our employees to maintain a proper mix of work and personal life
• Visit ( to learn more

Join us! CTC offers exceptional career growth, cutting edge technology, educational opportunities, and recognition for quality work.

Staffing Requisition: SR# 2025-0103

“We are an equal opportunity employer and all qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability status, protected veteran status, or any other characteristic protected by law.”

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