> Markdown version of [/jobs/ext/4524953-senior-network-infrastructure-engineer-f5-netscaler](https://www.wearedevelopers.com/jobs/ext/4524953-senior-network-infrastructure-engineer-f5-netscaler). Every page supports `.md` or `Accept: text/markdown`. Links point to the HTML versions so they work for humans too. Agent guide: [/agents.md](https://www.wearedevelopers.com/agents.md). --- # Senior Network Infrastructure Engineer - F5 / NetScaler - **Company:** Fiserv, Inc. - **Location:** Milton, GA, United States - **Experience:** Expert - **Salary:** $109,000 - $182,400 - **Contract:** Permanent contract - **Skills:** Computer Networks, Domain Name System Security Extensions, Domain Name System (DNS), Multi-Factor Authentication, Mobile Application Software, Python (Programming Language), Network Architecture, Network Administration, Citrix Systems, Performance Tuning, Ansible, Web Applications, Load Balancing, System Availability, Infrastructure Automation Frameworks, Information Technology, Citrix Netscaler - **Published:** November 2, 2026 - **Apply:** https://www.careerbuilder.com/job-details/senior-network-infrastructure-engineer-f5-netscaler-alpharetta-ga--8334cdeb-6c22-4bbb-bb0c-6d1b8754786c ## About the Role Network Administration/Management, F5 Network Software, Credit Cards, Mobile Applications, High Availability, Load Balancing, Government, Citrix Product Family, Identify Issues, F5 Network Software, * 8+ years of experience in network, systems, infrastructure engineering, or a related field * 6+ years of experience with Citrix NetScaler and/or F5 design, deployment, and support * 6+ years of experience with technologies such as LTM, GTM, HA, GSLB, ad content switching. * 4+ years of DNS experience, such as Bluecat, DNSSEC, and F5 XC. * Experience troubleshooting complex financial, regulated, enterprise infrastructure environments * Bachelor's degree in computer science, engineering, information technology, business, or a related field, or an equivalent combination of education, related experience, and/or military experience Experience that would be great to have * Experience with Python, Ansible, or other infrastructure automation tools * Experience with multi-factor authentication solutions * Experience supporting large-scale infrastructure migrations or modernization initiatives * F5 certifications such as F5-CTS or F5-CSE * Strong communication skills and experience working across technical teams, vendors, and business partners ## Description You will serve as a senior technical engineer supporting enterprise load balancing and DNS. You will lead the design, deployment, optimization, and troubleshooting of highly available infrastructure solutions, with a strong focus on F5 and Citrix NetScaler technologies. You will support Fiserv's government programs, partnering with infrastructure, application, security, and vendor teams to deliver secure, resilient, and scalable solutions. What you'll do * Design, deploy, and maintain a critical local and global load balancing infrastructure using Citrix NetScaler and F5 solutions. * Manage DNS infrastructure and configurations * Design and implement load balanced application configurations * Provide technical leadership and design guidance for application teams. * Troubleshoot complex infrastructure issues and drive problems through resolution * Lead platform upgrades, configuration changes, capacity planning, and performance optimization * Develop and maintain configurations for virtual servers, certificates, policies, and related services * Understand encryption technologies commonly used by web applications, DNS, and load balancing * Partner with application, infrastructure, security, OEM, and vendor teams on technical solutions * Operate in a regulated, controlled financial environment. * Develop technical standards, documentation, and implementation procedures * Identify opportunities to improve and automate infrastructure processes using tools such as Python and Ansible * Provide technical guidance and knowledge sharing across engineering teams