Senior Systems Administrator with Security Clearance


Markesman Group

Title Senior Systems Administrator Location Linthicum Description Markesman Group is currently seeking a highly experienced and technically proficient Senior Network Engineer to join our team in the Annapolis Junction/Linthicum, MD area. The Senior Network Engineer will play a crucial role in maintaining the operability, security, and efficiency of our systems and servers, ensuring adherence to organizational policies and procedures. The successful candidate will have a deep understanding of both Windows and Linux environments, along with expertise in networking, virtualization, and system administration. Core Tasks: Functional and Connectivity Testing: Conduct functional and connectivity testing to ensure the ongoing operability of systems and servers. Standard Operating Procedures: Develop and document systems administration standard operating procedures to facilitate consistent and efficient operations. System Security: Maintain baseline system security according to organizational policies, implementing STIG hardening recommendations where necessary. Account Management: Manage accounts, network rights, and access to systems and equipment, ensuring proper authorization and authentication mechanisms are in place. Data Redundancy and Recovery: Plan, execute, and verify data redundancy and system recovery procedures to mitigate the risk of data loss and ensure business continuity. Systems Installation and Troubleshooting: Install, update, and troubleshoot systems and servers, resolving hardware and operating system issues promptly. Policy Enforcement: Implement and enforce local network usage policies and procedures to maintain network integrity and security. Resource Management: Manage system and server resources, including performance, capacity, availability, serviceability, and recoverability, to optimize operational efficiency. Configuration Monitoring: Monitor and maintain system and server configurations to ensure compliance with organizational standards and requirements. Hardware Repairs: Perform repairs on faulty system and server hardware, coordinating with vendors for replacement parts if necessary. Interoperability Troubleshooting: Troubleshoot hardware/software interface and interoperability problems, resolving issues to minimize disruptions to operations.Requirements: Bachelor’s degree in a technical discipline and 15 years of experience as a System Administrator, or High school diploma and 20 years of experience as a System Administrator. Proficiency in both Windows and Linux environments, including patching and troubleshooting. Experience with VMware/ESXi, including networking switch VLAN setup and VMware virtual NIC configuration for isolation. Active Directory configuration and support expertise. Strong understanding of hardware and operating system troubleshooting methodologies. Familiarity with Security Technical Implementation Guide (STIG) hardening recommendations. Knowledge of project design within the scope of security requirements, such as Risk Management Framework (RMF). Active TS/SCI security clearance with Full Scope Polygraph (FSP). Active DoD IAT Level II certification (e.g., CCNA-Security, CySA+, GICSP, GSEC, Security+ CE, CND, SSCP). Demonstrated cyber/IT-related experience with excellent attention to detail, customer service skills, oral and written communication abilities, and problem-solving capabilities. About the Organization About Markesman Group Markesman Group has gathered the nation’s foremost experts in Cyber, ISR, Enterprise IT and Intelligence Analysis. We seek to lead with cutting edge technology, high quality development and best value services for both the government and commercial sectors. Our team combines passion, acumen, focus, patriotism, desire, dedication and the love for the job to create value for our customers. We pride ourselves in a rigorous selection process because not only do we want the best, we want the best to want us. Working closely together as part of a service-disabled veteran owned small business, we enjoy a family environment where teammates challenge and elevate each other every day. The Markesman family is always striving to solve tomorrow’s problems, today. EOE Statement We are an Equal Opportunity/Affirmative Action Employer. We consider applicants without regard to race, color, religion, age, national origin, ancestry, ethnicity, gender, gender identity, gender expression, sexual orientation, marital status, veteran status, disability, genetic information, citizenship status, or membership in any other group protected by federal, state, or local law. This position is currently accepting applications.

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