Sr. System Admin, IT Engineer III

Responsibilities & Qualifications RESPONSIBILITIES + Provide senior systems administrators and support to all incident escalation tickets that are unable to be resolved by Tier 1 personnel. + Responsible for daily operations and health of the DFC infrastructure. + Ensure the availability of the DFC network and all systems and services. + Manage all virtual servers, physical servers, enterprise storage, file and server backups, network switches, routers, firewalls, telecom closets, DFC datacenter. + Support and resolve escalation of tickets that cannot be resolved at the Tier I level as well as requests that require advanced knowledge or access using a combination of prior technical knowledge among team members via mentoring and cross-training. In addition, team members are expected to research and contribute to a shared knowledge base to help troubleshoot issues and share information to be used by others. + Tickets shall be maintained and updated with correct status and notes to fully document all actions taken to resolve issues. Tickets shall be resolved and closed within specified SLA timeframes. + As needed, engage external vendors to initiate support tickets, act as a main POC, and maintain consistent communication and troubleshooting efforts until resolution of problems. + DFCNet shall be monitored for system anomalies, errors, and failures and all system alerts shall be investigated, and a response must be provided to OIT management within the specified timeframe. + Certificate Management for internally generated PKI and 3rd party issued certificates. Research and contribute to a shared knowledge base to help troubleshoot issues and share information to be used by others. + Maintain complete, accurate and up-to-date documentation on all network applications and systems. Documentation types include Visio, Word, Excel and others to provide detailed views of traffic and data flows. REQUIRED QUALIFICATIONS + Masteru2019s degree in a relevant field + 1 year of experience or a Bacheloru2019s degree and 3+ years or 5 years experience. + 1+ years of experience in providing patching and vulnerability management and other security services + Experienced in Systems Administration of a complex network (Nutanix SAN, HP NAS) + Experienced in utilizing ServiceNow ITSM tool to track and resolve incidents, service requests, and changes + Experienced in providing Active Directory Support, account management, GPO management. + Experience with M365 services, Teams, Exchange, etc. + Familiar with Azure Active Directory + The position will be onsite at the DFC office in Washington, DC. + Must be a US Citizen + Must successfully obtain a Public Trust Overview We are seeking a Sr. Systems Admin, IT Engineer III to join our team supporting Joint Service Provider Infrastructure Support in Arlington, VA. The OIT's IT Operations team (ITOPS) maintains and manages DFC's network infrastructure systems, Data Center, IT networks and telecom circuits, switches, routers, firewalls, wireless Page 6access points, Network Access Controls (NAC), and end-user devices. This Division is also responsible for delivering and managing Windows/Linux desktop and server operating systems (OS), Azure Virtual desktop, Zscaler, Nutanix, Microsoft Office 365, Cisco and Azure infrastructure, and ServiceNow/ITSM services. This team provides direct Tier II client/customer support, incident management, and trouble resolution for all IT services, computing platforms, and wireless devices to a large remote workforce TekSynap is a fast growing high-tech company that understands both the pace of technology today and the need to have a comprehensive well planned information management environment. u201cTechnology moving at the speed of thoughtu201d embodies these principles u2013 the need to nimbly utilize the best that information technology offers to meet the business needs of our Federal Government customers. We offer our full-time employees a competitive benefits package to include health, dental, vision, 401K, life insurance, short-term and long-term disability plans, vacation time and holidays. Visit us at . Apply now to explore jobs with us The safety and health of our employees is of the utmost importance. Employees are required to comply with any vaccination requirements mandated by contract, applicable law or regulation. By applying to a role at TekSynap you are providing consent to receive text messages regarding your interview and employment status. If at any time you would like to opt out of text messaging, respond

Created: 2025-11-01