Senior System Administrator

Senior System Administrator

OASYS, INC., a Leading-Edge Government contractor, is seeking applicants for a Senior System Administrator position to support our Nasa customer in Huntsville, Alabama.

Job Responsibilities include: Designs, implements and operations/maintains the sites or enterprise's server, storage, database, network, client, or communication infrastructure.

Work is performed without appreciable direction. Exercised considerable latitude in determining objectives and approaches to assignment. Effects of decisions are long-lasting and heavily influence the future course of the organization. Errors in judgment or failure to achieve results would result in the expenditure of large amounts of company resources.

Essential Duties and Responsibilities may include the following. Other duties may be assigned.

• Understanding of network administration tools, techniques, and methods.
• Fundamental knowledge in networking principles (TCP/IP, DNS)
• Active Directory Domain Administrator - Manage and maintain: Sites and Services, DNS, DHCP, Group Policy Objects, Computer/User Objects, LDAP, Authentication protocols, AD Permission delegation using the least privilege methodology, Dynamic/Static AD groups, as well as other Domain services in accordance with MS best practices and compliance requirements.
• Experience with Current versions of Windows (e.g. Server 2019, 2022, 2025, Windows 10, 11 Enterprise)
• Configure and execute vulnerability scanning tools, SCAP/STIG scans (SCC Tool, OpenSCAP, etc.), and perform remediating steps based on findings on Windows and Linux operating systems.
• Apply OS patches and upgrades on a regular basis and upgrade administrative tools and utilities. Configure /add new services as necessary.
• Experience with SIEM tool, anti-virus software, etc. other cybersecurity software
• Develop and maintain installation and configuration procedures.
• Windows domain architecture experience
• Experience with Microsoft Server products
• Experience with Microsoft Active Directory
• Excellent interpersonal and teamwork skills, analytical and problem-solving skills, written and verbal communication abilities.
• Applicant must have some experience with the application of DISA Security Technical Implementation Guides (STIGs) on operating systems Windows and Linux operating systems.

Supervisory Responsibilities

• This job has no supervisory responsibilities but provides technical leadership and guidance to other Systems Administrators.
• This includes, but is not limited to: training employees, planning, assigning, directing work and resolving technically related work problems. It also includes interaction with other technical teams and assisting in the management of vendor relationships.

Competencies

To perform the job successfully, an individual should demonstrate the following competencies:

• Analytical - Collects and researches data; uses intuition and experience to complement data.
• Problem Solving - Identifies and resolves problems in a timely manner; gathers and analyzes information skillfully; works well in group problem solving situations.
• Project Management - Communicates changes and progress.
• Technical Skills - Pursues training and development opportunities; strives to continuously build knowledge and skills.
• Oral Communication - Speaks clearly and persuasively in positive or negative situations; listens and gets clarification; responds well to questions; participates in meetings.
• Written Communication - Writes clearly and informatively; Edits work for spelling and grammar; Varies writing style to meet needs; Presents numerical data effectively; Able to read and interpret written information.
• Teamwork - Gives and welcomes feedback; supports everyone's efforts to succeed. Builds team relations.
• Leadership/Managing People - Exhibits confidence in self and others; Inspires and motivates others to perform well; Effectively influences actions and opinions of others; Accepts feedback from others; Gives appropriate recognition to others. Comes to