Sr. Systems Administrator

Posted 8/14/2026 · last confirmed live 8/26/2026

Job Description CSCI Consulting is seeking a Senior Systems Administrator to support the administration, maintenance, and optimization of a complex Infrastructure-as-a-Service (IaaS) environment. The Senior Systems Administrator will be responsible for ensuring the availability, security, performance, and reliability of Linux, Windows Server, VMware, and cloud-based infrastructure platforms. In this role, you will partner with infrastructure teams, enterprise architects, application support personnel, and business stakeholders to deliver scalable, secure, and highly available technology solutions while supporting operational excellence and continuous improvement initiatives. Responsibilities Administer and support enterprise infrastructure environments, including VMware virtual machines, Oracle Linux, and Microsoft Windows Server operating systems Troubleshoot and resolve complex server, infrastructure, and application issues independently and within established service level agreements Install, configure, maintain, and support Microsoft Active Directory Services infrastructure Manage and maintain Salesforce-related user accounts and access controls Monitor platform performance, capacity, utilization, and overall system health to maximize availability and reliability Administer DHCP, DNS, IIS, sFTP, and other critical infrastructure services Support and manage cloud-hosted and virtualized infrastructure environments Collaborate with Enterprise Architecture and cross-functional teams to design scalable, secure, and resilient infrastructure solutions Maintain server hardware and software inventories, configurations, and technical documentation Participate in database design, implementation, and support activities Implement and enforce security standards, policies, and procedures across infrastructure environments Manage Windows Server security configurations, vulnerability remediation, and patch management activities Provision and administer user accounts, credentials, permissions, and access controls Support web portals, middleware platforms, infrastructure applications, APIs, monitoring solutions, and network services Facilitate deployment of application updates, enhancements, and infrastructure changes across environments Develop recommendations for operational improvements and infrastructure optimization Support incident management activities, including root cause analysis and service restoration efforts Monitor, troubleshoot, and resolve backup failures and disaster recovery issues Respond to infrastructure monitoring alerts and performance concerns Manage and resolve customer support tickets, requests, and escalated technical issues Participate in an on-call rotation supporting critical business systems during evenings, weekends, and holidays Contribute to system architecture planning, infrastructure modernization, and cloud adoption initiatives Develop and maintain operational procedures, configuration standards, and disaster recovery documentation Minimum Requirements Bachelor’s degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent combination of education, certifications, and experience 5+ years of experience administering and supporting enterprise server environments in production Strong experience with Oracle Linux and Microsoft Windows Server operating systems Experience administering and supporting VMware vSphere and virtualized infrastructure environments Strong knowledge of Microsoft Active Directory Services Working knowledge of SQL scripting and database concepts Experience supporting DHCP, DNS, IIS, sFTP, and related infrastructure services Knowledge of NAS and SAN storage technologies and connectivity concepts Understanding of domain and forest administration, networking fundamentals, and routing/switching concepts Experience with performance monitoring, tuning, capacity planning, and system optimization Basic to intermediate proficiency with shell scripting and automation Experience troubleshooting server, application, and infrastructure issues in production environments Ability to design, document, and support enterprise infrastructure solutions Strong analytical, troubleshooting, and problem-solving skills Ability to gather, interpret, document, and evaluate technical requirements Experience communicating technical solutions and recommendations to both technical and non-technical stakeholders Creativity and adaptability in problem-solving Ability to work with clients to understand their needs Strong organizational and time-management skills Excellent written and verbal communication skills Professional presence Preferred Skills Experience with VMware Site Recovery Manager (SRM), VMware Cloud Director, and VMware migration tools and methodologies Knowledge of Morpheus VM Essentials Experience supporting Infrastructure-as-a-Service (IaaS) environments Experience with public cloud platforms, including Microsoft Azure, AWS, Oracle Cloud Infrastructure (OCI), or Google Cloud Platform (GCP) Experience migrating applications and services to cloud environments Experience installing, configuring, and supporting CI/CD tools such as Jenkins and GitLab Knowledge of containerization technologies, including Docker Experience implementing and supporting analytics and reporting platforms such as Looker Intermediate proficiency with Python, Bash, or other scripting languages for automation and integration Experience with infrastructure automation and configuration management practices Knowledge of networking and cybersecurity principles Experience managing relationships with cloud providers and managed service vendors Experience working within an ITIL-based service management framework Understanding of disaster recovery, business continuity, and high-availability solutions Relevant Linux certifications such as RHCSA, RHCE, Linux+, or equivalent Microsoft, VMware, Azure, or cloud infrastructure certifications Experience supporting financial services, government, or highly regulated environments Experience developing operational standards, infrastructure governance processes, and technical documentation Strong commitment to continuous improvement, operational efficiency, and customer satisfaction Ability to work in a team environment, as well as independently Strong customer and vendor relationship skills Demonstrated ability to comply with data standards and policies Motivation to learn new technologies and methodologies that demonstrate value Past experience working with a state/local government agency About CSCI CSCI is an award-winning information technology and financial management consulting firm founded on one simple philosophy: “Do what is right, always.” We apply this philosophy across all elements of our growing business, from delivering world-class s ervices for customers to providing an environment where associates thrive both personally and professionally. At CSCI, work and fun aren’t diametrically opposed! At CSCI, our goal is to hire people with proven track records and retain them with an energizing, diverse company culture. We value each associate’s natural drive to excel, and we provide them with the freedom to do things their way. CSCI seeks the best and brightest in the industry—those who are ready to move their lives and career forward. Join us today and get excited about Mondays again! Benefits of Working at CSCI Competitive salaries Generous Paid Time Off (PTO) package Paid holidays aligned to the Federal calendar Full health benefits including medical, dental, vision, and life insurance   401(k) retirement plan Team building events Professional development support     Legal CSCI complies with all applicable Federal, state, and local employment regulations. Please reach out to HR@csciconsulting.com with any questions.   Equal Employment Opportunity All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, age, disability or veteran status, or any other applicable state or federal protected class. CSCI provides affirmative action in employment for qualified Individuals with a Disability and Protected Veterans in compliance with Section 503 of the Rehabilitation Act and the Vietnam Era Veterans’ Readjustment Assistance Act. If you require an accommodation, please contact CSCI Human Resources for further assistance. For questions regarding the qualifications listed above, please contact the CSCI Recruiting Team. E-Verify CSCI participates in E-Verify to confirm the employment eligibility of all newly hired employees. For more information, please visit  www.dhs.gov/E-Verify .   California Consumer Privacy Act (CCPA) Notice As part of the application and recruitment process, CSCI Consulting, Inc. may collect personal information as described under the California Consumer Privacy Act (CCPA).  This information is collected solely for employment-related purposes, including evaluating your qualifications, processing your application, and complying with legal obligations.   By applying to this position, you acknowledge that you have read and understand the following notice regarding the collection of your personal information as a job applicant:   Categories of Information Collected: Personal identifiers, employment history, educational information, and any other information provided in your application or as part of the interview process. Purposes for Collecting Information: To review your application, assess your qualifications, and manage the hiring process. Retention and Security: Information collected will be retained indefinitely and will be securely stored and handled in accordance with CCPA guidelines and CSCI Consulting, Inc. policies. Rights of Applicants: Under CCPA, California residents have the right to request information about the personal data we collect, delete it, and request restrictions on certain uses. However, some information may be retained as required by law.   For further information, or to exercise your rights under the CCPA, please contact CSCI’s HR team.   Disclaimer The above declarations are not intended to be an all-inclusive list of the duties and responsibilities of the job described, nor are they intended to be such a listing of the skills and abilities required to do the job. Rather, they are intended only to describe the general nature of the job.

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