Appian's Information Security department is currently seeking a Senior Infrastructure & Security Engineer, internally titled Senior IT Engineer, eager to be hands-on and involved in many different areas of responsibility. As a Senior IT Engineer, you'll also collaborate with infrastructure technology peers and handle business solutions for the company's network infrastructure. The ideal candidate should have a track record of using a diverse set of technologies to achieve business goals. This role is based at our headquarters in McLean, Virginia. Appian was built on a culture of in-person collaboration, which we believe is a key driver of our mission to be the best. Employees hired for this position are expected to be in the office 5 days a week to foster that culture and ensure we continue to thrive through shared ideas and teamwork. We believe being in the office provides more opportunities to come together and celebrate working with the exceptional people across Appian. Responsibilities: * Plan and lead LAN, WAN, network security, and systems projects across diverse technology platforms including multi-vendor wired (enterprise switches, routers and firewalls) and wireless networks, VPNs, VOIP, etc across a hybrid global infrastructure footprint. * Internal certificate and certificate authority management. Configuring and managing radius server in a High Availability (HA) environment * Designing and implementing global wireless Infrastructure. Managing and maintaining tools to enhance wireless performance * Managing, implementing, and integrating RADIUS, IDPs, LDAP, and other AAA-related protocols and systems. * Leverage both cloud (AWS, Azure, GCP) and physical network/compute infrastructure to find creative solutions to complex problems * Automate cloud infrastructure deployment and management using Infrastructure as Code (e.g. Terraform, CloudFormation) and scalable automation tools such as Ansible * Respond to and resolve emergent problems across our diverse enterprise systems, from the physical layer to the application layer * Utilize best practices based on various frameworks (e.g. ITIL, ISO, SOC, PCI) and support internal and external audit activities * You'll use the know-how and discerning standards you've acquired over years of experience to recommend emerging technologies to keep our network modern, innovative, and secure * Collaborate with teams of fellow tech gurus and play an integral part of network and systems design, architecture and administration Required Experience: * A BS in Computer Science or related field/degree or equivalent experience * In-depth understanding of networking protocols, technologies, and concepts (TCP/IP, VLANs, routing, switching, subnetting, etc.) * Experience designing, implementing and maintaining wireless infrastructure. Troubleshooting wireless related issues, optimizing coverage, capacity and wireless performance. * Strong knowledge and hands-on experience with RADIUS, IDPs (e.g., SAML, OAuth, OpenID Connect), LDAP, and other AAA-related protocols and systems. * Understanding of security principles, including multifactor authentication (MFA), encryption, and vulnerability management. * You have experience with scripting and automation tools that manage network and infrastructure configuration changes (preferably using source control)l. Automating your way out of a repetitive task is second nature. Familiarity with languages such as Python and IaC or infrastructure automation systems such as Ansible and Terraform are a significant plus. * Experience with network monitoring and troubleshooting tools. * You have an ability to approach problems from unconventional angles, offering unique perspectives * You have a forward-thinking mindset, forecasting potential problems and following developing technological trends Nice to Have: * You are skilled with the BGP routing protocol. You have the ability to plan, design, implement and troubleshoot BGP routing issues. * You have 6+ years of experience working with Fortinet/ Ruckus technologies.