Appian System Administrator - Clearance Required

Overview LMI is seeking an experienced Appian System Administrator to support Army CPE, ES2, AT&R in the sustainment and enhancement of the Army Contract Writing System (ACWS). ACWS is built on the Appian Platform. The Appian System Administrator will support platform configuration, environment operations, application deployments, access administration, monitoring, troubleshooting, and system reliability across ACWS environments. LMI is a new breed of digital solutions provider dedicated to accelerating government impact with innovation and speed. Investing in technology and prototypes ahead of need, LMI brings commercial-grade platforms and mission-ready AI to federal agencies at commercial speed. Leveraging our mission-ready technology and solutions, proven expertise in federal deployment, and strategic relationships, we enhance outcomes for the government, efficiently and effectively. With a focus on agility and collaboration, LMI serves the defense, space, healthcare, and energy sectors—helping agencies navigate complexity and outpace change. Headquartered in Tysons, Virginia, LMI is committed to delivering impactful results that strengthen missions and drive lasting value. Responsibilities The ideal candidate combines strong Appian platform knowledge with practical systems administration, integration, performance, and security experience and will work closely with developers, solution architects, DevSecOps engineers, database administrators, information assurance personnel, and functional stakeholders. Administer and maintain Appian Platform environments supporting ACWS application development, testing, staging, and production operations. Perform Appian application deployments, configuration changes, environment promotions, and release support in accordance with approved procedures. Manage Appian users, groups, roles, permissions, service accounts, and access-related configuration in coordination with security and program policies. Monitor Appian platform health, performance, capacity, logs, services, integrations, and system availability and take corrective action as needed. Support Appian Cloud configuration and platform support processes and coordinate with hosting or vendor support organizations when required. Troubleshoot complex Appian application, integration, performance, configuration, and connectivity issues and coordinate with development and infrastructure teams for resolution. Support enterprise identity and access integrations, including LDAP, Active Directory, SSO, SAML, certificates, and related authentication mechanisms. Support Appian in-memory data and platform architecture considerations, including sizing and horizontal or vertical scaling activities as directed. Coordinate with database administrators, DevSecOps engineers, cybersecurity personnel, and solution architects on platform changes, maintenance, and incident resolution. Support security hardening, configuration compliance, patching, and operational documentation for Appian environments. Maintain configuration records, runbooks, operational procedures, and troubleshooting guides and contribute to knowledge management. Participate in Agile planning, release activities, testing, user acceptance testing, and production implementation efforts. Qualifications MINIMUM QUALIFICATIONS: Bachelor's degree in Information Technology, Computer Science, Information Systems, Engineering, or a related field; equivalent relevant experience may be considered. 5+ years of experience in system administration, enterprise application administration, application operations, or related technical roles. Demonstrated experience administering enterprise applications and supporting application deployments, configurations, access controls, and troubleshooting. Experience with platform monitoring, logs, diagnostic tools, configuration management, and performance troubleshooting. Experience supporting identity and access technologies such as LDAP, Active Directory, SSO, SAML, or certificates. Strong understanding of enterprise application architecture, integrations, security, and operational support processes. Active Secret clearance or ability to obtain and maintain one. U.S. citizenship required. DESIRED SKILLS Appian Platform administration or application operations experience strongly preferred. Appian certification or formal Appian training. Experience with Appian Cloud or Appian GovCloud and related platform support processes. Experience with Appian in-memory KDB engines, environment sizing, scaling, and performance optimization. Experience supporting DoD contract writing, acquisition, or other federal mission-critical applications. Familiarity with DoD RMF, STIGs, DISA security guidance, and security hardening activities. ITIL Foundation, Security+, or comparable technical certification. Experience working in Agile or SAFe delivery environments. The target salary range for this position goes up to $144,000. The salary range displayed represents the typical salary range for this position and is not a guarantee of compensation. Individual salaries are determined by various factors including, but not limited to location, internal equity, business considerations, client contract requirements, and candidate qualifications, such as education, experience, skills, and security clearances. Job Locations US-Remote