• Manage the end-to-end patching lifecycle for both Linux (RHEL/Ubuntu/CentOS) and Windows Server environments. • Analyze scan results from tools (e.g., Nessus, Qualys, or Rapid7), prioritize risks based on criticality, and execute remediation plans. • Maintain detailed records of patching cycles and vulnerability status to meet strict Managed Services SLAs and audit requirements. • Provision, configure, and maintain resources within Google Cloud Platform (GCP), including Compute Engine, VPCs, IAM, and Cloud Storage. • Monitor cloud health and implement scaling policies to ensure cost-efficiency and high availability. • Utilize Ansible to automate repetitive tasks, configuration management, and complex application deployments. • Develop and maintain automated machine image builds (Golden Images) using Packer for multi-cloud and on-premise consistency.

• Provide responsive customer support via phone, email, and other channels. • Manage and maintain strong relationships with assigned customer accounts. • Accurately record all customer interactions, investigations, and resolutions. • Monitor system dashboards and security alerts, taking prompt action when needed. • Recreate and troubleshoot reported issues using internal guides and best practices. • Collaborate with internal teams to resolve complex technical problems. • Assist with application roll-outs and updates to ensure smooth implementation. • Identify and resolve system errors to maintain optimal performance. • Support configuration change projects and ensure accurate implementation. • Apply release scripts and perform testing to validate configuration changes. • Complete routine administrative tasks to support daily operations. • Manage communications through shared mailboxes efficiently. • Maintain up-to-date technical and procedural documentation. • Provide out-of-hours support when required to ensure service continuity.

Title: Senior Systems Administrator Location: Remote, USA Job Description: Requisition # R67260 Locations USA-Remote Work Security Clearance Required Secret Remote Type Fully Remote Time Type Full time Description & Requirements Shape the future of defense with MANTECH! Join a team dedicated to safeguarding our nation through advanced tech and innovative solutions. Since 1968, we’ve been a trusted partner to the Department of Defense, delivering cutting-edge projects that make a real impact. Dive into exciting opportunities in Cybersecurity, IT, Data Analytics and more. Propel your career forward and be part of something extraordinary. Your journey starts now—protect and innovate with MANTECH! ***This is for a future opportunity*** MANTECH seeks a motivated, career and customer-oriented Senior Systems Administrator to join our CASTLE-NET Program team. This is a remote position. Be a part of an agile team to provide innovative, customer focused, and cost-effective integrated enterprise IT support services in support of the client’s vision of engineering solutions for the Nation’s toughest challenges. Responsibilities include but are not limited to: - Managing and maintaining the IT infrastructure to ensure reliability, performance, and security across Windows, Linux, and VMware environments. - Installing, configuring, and supporting servers and virtualized environments while working closely with developers and stakeholders to ensure compliance with best practices. - Maintaining comprehensive documentation of system configurations and procedures while ensuring maximum system security and availability. - Planning and leading major technology assignments and evaluating performance results to recommend changes affecting project growth. - Functioning as a technical expert across multiple project assignments, providing world-class IT services and responsive customer support. - Working with all stakeholders to ensure complete and functional systems that meet all requirements and exceed end-user expectations. Minimum Qualifications: - High School Diploma/GED with 12+ years of experience, or a bachelor’s degree in IT or Computer Science with 8+ years of experience in systems administration. - Comprehensive knowledge of relevant operating systems including Windows Server, Red Hat, and CentOS, as well as virtualization technologies like VMware vSphere. - Proficiency in scripting languages such as PowerShell, Bash, or Python for automation and performance tuning. - Experience with system monitoring, patch management, and implementing rigorous security remediations. - Must hold and maintain an 8140 IAT Level II compliant certification (e.g., Security+ CE, SSCP) upon hire. - Ability to maintain relevant technical certifications such as Microsoft Certified: Windows Server, RHCSA, or VMware Certified Professional (VCP). Preferred Qualifications: - Certified Information Systems Security Professional (CISSP certification). - Familiarity with the USACE IT environment, regulatory requirements, and data security best practices. - Self-starter with excellent people skills who can communicate effectively with technical and non-technical stakeholders to drive change throughout an organization. Clearance Requirements: - Must possess a Secret security clearance prior to starting this position. Physical Requirements: - The person in this position must be able to remain in a stationary position 50% of the time. Occasionally move about inside the office to access file cabinets, office machinery, or to communicate with co-workers, management, and customers, via email, phone, and or virtual communication, which may involve delivering presentations. The projected compensation range for this position is $105,900.00-$177,300.00. There are differentiating factors that can impact a final salary/hourly rate, including, but not limited to, Contract Wage Determination, relevant work experience, skills and competencies that align to the specified role, geographic location (For Remote Opportunities), education and certifications as well as Federal Government Contract Labor categories. In addition, MANTECH invests in its employees beyond just compensation. MANTECH’s benefits offerings include, dependent upon position, Health Insurance, Life Insurance, Paid Time Off, Holiday Pay, short-term and long-term Disability, Retirement and Savings, Learning and Development opportunities, wellness programs as well as other optional benefit elections.

Title: NCIS Systems Administrator | Active Top Secret clearance Location: USA VA Quantico Full Part/Time: Full time Job Req: RQ218796 Type of Requisition: Regular Clearance Level Must Currently Possess: Top Secret Clearance Level Must Be Able to Obtain: Top Secret/SCI Public Trust/Other Required: None Job Family: IT Infrastructure and Operations Job Qualifications: Skills: Mobile Device Management (MDM), Next-Generation Network (NGN), System Administration Certifications: None Experience: 5 + years of related experience US Citizenship Required: Yes Job Description: Transform technology into opportunity as a Systems Administrator at GDIT. Shape what's next for mission-critical government projects while shaping what's next for your engineering career. The Naval Criminal Investigative Service (NCIS) is an organization of approximately 2,000 personnel of which 700 serve at HQ and the remaining staff serve at offices worldwide. NCIS is the DON component with primary responsibility for criminal investigation, law enforcement (LE), counterterrorism (CT), counterintelligence (CI), and cyber matters. NCIS not only has primary responsibility for all criminal investigative, CI, CT, and cyber matters within the DON, but it also has exclusive investigative jurisdiction in non-combat matters involving actual, potential, or suspected criminal, terrorism, sabotage, espionage and subversive activities. MEANINGFUL WORK AND PERSONAL IMPACT As a Systems Administrator, the work you'll do at GDIT will be impactful to the mission of the NCIS team at Quantico, VA. - Administer, manage and maintain Windows servers 2019 and 2022. - Responsible for Windows Server patching in an operational environment. - Experience with the following: Domain controllers, Active Directory Federation Services (AD FS), Active Directory, DNS servers, DHCP and Group Policy Object. - Create, manage, and maintain accounts and groups in Active Directory, LDAP - Experience with PowerShell scripting. - Monitors system environments and resources. - Analyze, troubleshoot, resolve, and documents problems with business applications and hardware on all enclaves. - Oversees system recovery mechanisms. - Exhibit the capability to resolve issues independently. - Coordinate, communicate, escalate required changes, and major issues . - Help diagnose and resolve computer-related problems as requested by employees and contractors, either in person or by using remote control software. - Respond to telephone calls and email requests for technical support . - Accurately documents all work in ServiceNow. WHAT YOU'LL NEED TO SUCCEED - Security Clearance Level: Active Top Secret clearance (Must be TS/SCI eligible) - Required Experience: - 5+ years of experience with Systems Administration, general computer system, network administration, and user support experience - Experience in (MDM) support and solutions - Experience with the NGEN IT infrastructure and enterprise class networks - Ability to administer user accounts and device associations in Active Directory - Experience deploying DISA STIGs controls and system compliance - Must have prior experience with installation, operation, configuration, and maintenance of multiple types of business and end user-specific application software in a large government installation - Experience with one or more of the following: Domain controllers, Active Directory, DNS servers, DHCP and Group Policy Object - Innovative and collaborative environment encouraging of highly motivated critical thinking - Required Certifications: CompTIA Security+ CE - Education: BS Degree or equivalent Computer Science or IT related degree - Location: Hybrid - 3 days onsite at Quantico, VA / 2 days remote - US Citizenship required GDIT IS YOUR PLACE At GDIT, the mission is our purpose, and our people are at the center of everything we do. - Growth: AI-powered career tool that identifies career steps and learning opportunities - Support: An internal mobility team focused on helping you achieve your career goals - Rewards: Comprehensive benefits and wellness packages, 401K with company match, and competitive pay and paid time off - Flexibility: Full-flex work week to own your priorities at work and at home - Community: Award-winning culture of innovation and a military-friendly workplace OWN YOUR OPPORTUNITY Explore a career in software development at GDIT and you'll find endless opportunities to grow alongside colleagues who share your dedication to advancing innovation. #NCIScareers The likely salary range for this position is $93,662 - $108,100. This is not, however, a guarantee of compensation or salary. Rather, salary will be set based on experience, geographic location and possibly contractual requirements and could fall outside of this range. Scheduled Weekly Hours: 40 Travel Required: None Telecommuting Options: Hybrid Work Location: USA VA Quantico Additional Work Locations: Total Rewards at GDIT: Our benefits package for all US-based employees includes a variety of medical plan options, some with Health Savings Accounts, dental plan options, a vision plan, and a 401(k) plan offering the ability to contribute both pre and post-tax dollars up to the IRS annual limits and receive a company match. To encourage work/life balance, GDIT offers employees full flex work weeks where possible and a variety of paid time off plans, including vacation, sick and personal time, holidays, paid parental, military, bereavement and jury duty leave. To ensure our employees are able to protect their income, other offerings such as short and long-term disability benefits, life, accidental death and dismemberment, personal accident, critical illness and business travel and accident insurance are provided or available. We regularly review our Total Rewards package to ensure our offerings are competitive and reflect what our employees have told us they value most. We are GDIT. A global technology and professional services company that delivers consulting, technology and mission services to every major agency across the U.S. government, defense and intelligence community. Our 30,000 experts extract the power of technology to create immediate value and deliver solutions at the edge of innovation. We operate across 50 countries worldwide, offering leading capabilities in digital modernization, AI/ML, Cloud, Cyber and application development. Together with our clients, we strive to create a safer, smarter world by harnessing the power of deep expertise and advanced technology.