Network Administrator

The Defense Sector at Leidos is seeking a motivated TS/SCI cleared Network Administrator to support the installation, configuration, and day-to-day management of enterprise network infrastructure. This role is an excellent opportunity for an early-career network professional to gain hands-on experience with routing and switching platforms, including Session Smart Router (SSR) / 128 Technology SD-WAN solutions, in a structured and security-conscious environment. The ideal candidate demonstrates a solid foundation in networking fundamentals, a willingness to learn vendor-specific technologies, and the discipline to operate within DoD network standards. The job duties will be performed daily on site at Langley Air Force Base, VA. ​ Roles and Responsibilities: ​Assist in the configuration, deployment, and ongoing management of routers, switches, and Session Smart Router (SSR) appliances across enterprise and edge network environments. ​Support the design and implementation of routing policies, service policies, and traffic steering configurations on SSR/128 Technology platforms under senior engineer guidance. ​Perform LAN switching administration — including VLAN configuration, spanning tree, trunking, and port security — on Juniper EX Series and/or Cisco Catalyst platforms. ​Assist with the configuration and troubleshooting of routing protocols including OSPF and BGP (eBGP and iBGP) across enterprise WAN and data center environments. ​Monitor network health, availability, latency, and throughput using network management tools; escalate anomalies and assist in root cause analysis. ​Support configuration and maintenance of firewall rules, access control lists (ACLs), IPsec VPN tunnels, and other network security controls. ​Execute software and firmware upgrades, patch management, and lifecycle maintenance activiti

Transform technology into opportunity as an F5 Administrator at Leidos. You will play a crucial role in configuring, maintaining, and troubleshooting F5 load balancing and traffic management systems to ensure high availability, reliability, and performance of critical applications and services for USCENTCOM on the CITS contract. The F5 Administrator is responsible for the configuration, deployment, and maintenance of F5 BIG-IP systems, ensuring the optimal performance, security, and availability of critical applications. This role involves hands-on technical work, troubleshooting complex F5-related issues, and collaborating with various IT teams to integrate F5 solutions within the broader network and infrastructure environment. The F5 Administrator will contribute directly to the mission success of USCENTCOM by maintaining robust and efficient application delivery services. Primary Responsibilities: F5 System Configuration & Maintenance Configure, deploy, and maintain F5 BIG-IP systems, including Load Balancers, Application Delivery Controllers (ADCs), and SSL offloading configurations. Design and implement traffic management rules, including global server load balancing (GSLB) and local server load balancing (LSLB). Manage F5 configurations for SSL/TLS offloading, including key and certificate management for secure communication. Configure and maintain F5 iRules to manage application traffic and provide enhanced functionality for specific use cases. Assist in performing F5 system upgrades, patches, and troubleshooting tasks to ensure continued system functionality. Assist in the design and implementation of new F5 solutions to improve application delivery, scalability, and security. Troubleshooting & Performance Optimization Troubleshoot and r

Are you ready for your next career challenge? Leidos has an opportunity for a seasoned System Administrator at Davis Monthan AFB, AZ. Candidates must possess a current TS/SCI security clearance in order to be considered. In this role you will be responsible for overseeing JWICS operations for all Wing and subordinate unit SCIFs on site. You will also be responsible for all Site-wide JWICS Command, Control, Communications, Computers, and Intelligence (C4I) and perform JWICS specific touch maintenance to install and maintain computers, servers, and all JWICS related software and hardware. (This also includes but is not limited to account management, network storage, local authentication servers, file servers, user privileges, local group policy, local software testing, restoration operations, contingency planning, and local backups.) Ensure security patching is completed and locally downloaded, and also push JAVA, NOTAMS, and TCNO patches the AF JWICS Enterprise is unable to perform remotely. Primary Responsibilities: Work directly with users at the site and liaise daily with the ESD and ESC AF to help resolve user and network related issues as well as maintain the integrity of the Site domain. Perform investigative administration operations in support of the Cyber Security Operations Center for malware, spyware, Trojans, or unauthorized software that gets detected on any device at the Site. The position is full time daily operation and may require after hours and weekend duty via on-call support. Work autonomously with minimal oversight as well as in conjunction with multiple personnel in the fulfillment of the individual employee’s functions. Must have the ability to gather facts and use effective analytical and evaluative methods to assess information, plan the sequence of actions necessary, make sound decisions and solve a variety of security problems. Thorough understanding of their respective po

About Mach Industries Founded in 2023, Mach Industries is a rapidly growing defense technology company focused on developing next-generation autonomous defense platforms. At the core of our mission is the commitment to delivering scalable, decentralized defense systems that enhance the strategic capabilities of the United States and its allies. With a workforce of approximately 350 employees, we operate with startup agility and ambition. Our vision is to redefine the future of warfare through cutting-edge manufacturing, innovation at speed, and unwavering focus on national security. We are dedicated to solving the next generation of warfare with lethal systems that deter kinetic conflict and protect global security. The Role We are seeking a proactive and customer-focused Help Desk Technician to provide both Level 1 and Level 2 technical support within our growing organization. The successful candidate will be the first point of contact for technical assistance and will handle a wide range of IT support requests, from basic troubleshooting to more complex technical issues. You will play a critical role in ensuring that IT systems and services run smoothly and efficiently day-to-day. Key Responsibilities Serve as the first point of contact for employees seeking technical assistance with their IT equipment. Troubleshoot and resolve hardware, software, and network-related issues for both Level 1 and Level 2 support cases. Assist with the setup, configuration, and maintenance of workstations, laptops, mobile devices, and other equipment. Perform basic network troubleshooting, including diagnosing connectivity issues, resetting network devices, and verifying internet access. Manage user accounts and permissions in systems such as [Active Directory, Google Suite, Slack, Okta] and other enterprise platforms. Install, configure, and update software applications on workstations and resolve software-related issues. Provide support for peripheral devices such as printers, scan

At Affirm, we exist for the moments that matter—giving people a clear, predictable way to pay over time, with no hidden fees, no surprises, and no tradeoffs on what matters most. The IT team helps keep Affirm’s people productive, connected, and secure by supporting the technology employees rely on every day. We manage and support end-user devices, enterprise applications, office technology, and IT infrastructure while maintaining a strong focus on security, compliance, and a seamless employee experience. Our team works across a broad range of technologies and partners closely with employees throughout the company to troubleshoot issues, improve processes, and build reliable, scalable solutions as Affirm grows. We’re seeking a flexible IT Support Administrator to help manage and support Affirm’s New York City office and technology infrastructure. Our ideal candidate excels in troubleshooting and problem-solving, with respect for compliance, and documentation. As a Support Administrator of a rapidly growing company, you will be the backbone of IT, with efficiency, security, and customer satisfaction being your primary objectives. What You'll Do: Locally support and troubleshoot users within our NYC office Remotely support and troubleshoot our end user’s problems Educate on and enforce our IT compliance and policy obligations Maintain our Zoom Rooms and AV hardware within conference rooms Monitor for security threats and malware, staying ahead of the curve to protect our users Occasionally maintain the in-office, local network infrastructure Maintain enterprise systems and company IT assets such as servers and desktops What We Look For: Experience with macOS administration and support Ability to improvise and find immediate solutions Experience managing formal ticketing systems Experience administering SaaS technologies Flexibility to work with all types of technology macOS, Windows, Printers, Network devices, etc. Experience with machine and account prov

About the role Sana Biotechnology is growing, and we are hiring new team members who believe in the potential of engineered cells as medicines, who are passionate about delivering the possible to patients, and who lead with the desire to work on novel ideas. As a Sr. Systems Administrator, you will report to the Director, IT Infrastructure and help design, implement, operate, secure, and continuously improve the infrastructure services that support Sana’s corporate, research, laboratory, and regulated environments. You will serve as a senior hands-on technical resource, lead complex infrastructure initiatives, and partner with IT, Quality, Security, business stakeholders, vendors, and service providers to deliver reliable, scalable, and compliant solutions across a multi-site environment. What you’ll do Administer, maintain, and improve on-premises and cloud infrastructure, including Windows Server, virtualization, storage, backup and recovery, identity, directory, and core network services Lead the technical design and implementation of infrastructure projects, upgrades, migrations, lifecycle replacements, and new site or system deployments Operate infrastructure supporting GxP and other regulated business processes in accordance with approved procedures, change control, security, data integrity, and validation requirements Monitor system health, capacity, performance, availability, and security; plan and execute patching, preventative maintenance, vulnerability remediation, and lifecycle activities before risks affect business operations Troubleshoot and resolve complex incidents and recurring problems across servers, cloud services, identity platforms, storage, backup, and integrated infrastructure technologies; participate in incident response and scheduled maintenance as needed Develop and maintain automation for routine administration, monitoring, reporting, configuration, and remediation activities Manage backup and recovery operations, perform restore testin