AT&T has an opening for an NMS Service Now Software Designer: To support a key program in AT&T’s National Security business segment. The NMS IT Software Designer will provide expert knowledge of network management systems, operating systems, commercial software, government software, and full integration of toolsets and servers.

This position requires office presence a minimum of 5 days per week and is only located in the location(s) posted.

• Deploy, administer, develop, and integrate the Service Now platform on RHEL and Windows; coordinate with database developers on MariaDB connectivity, schema design, and performance optimization.
• Operate within Agile/Scrum and established SDLC processes to plan, build, test, and deliver Service Now capabilities; participate in daily stand-ups, sprint planning, reviews, and retrospectives.
• Partner with Project Managers and Technical Leads to communicate status, risks, and technical issues; provide level-of-effort estimates and technical recommendations.
• Design, implement, and maintain integrations between Service Now, Cisco Network Services Orchestrator (NSO), GOTS solutions, and other enterprise tools using REST/SOAP APIs, Integration Hub, and MID Server.
• Develop and maintain technical documentation, including design specifications, runbooks, and user guides; support knowledge transfer and user training as needed.
• Monitor application performance and availability; develop dashboards and alerts and proactively remediate issues to maintain system health and reliability.
• Implement security hardening and compliance controls; support RMF authorization and accreditation activities by generating required artifacts, remediating findings, and applying DISA STIG/SCAP benchmarks and customer-specific requirements.
• Contribute to the automation of Service Now deployments and related tasks using Ansible, Python, Terraform, and PowerShell; assist in developing test, validation, and verification scripts.
• Troubleshoot and resolve complex system and service issues; perform and document Root Cause Analysis (RCA) and implement corrective and preventive actions.
• Conduct system performance analysis and tuning to optimize configurations, capacity, and throughput.
• Execute engineering tasks across the full SDLC, adhering to change and release management processes and delivering solutions within defined scope, schedule, and quality parameters.
• Package and deliver robust, production-ready solutions to Operations with minimal manual intervention and a high success rate.
• Perform additional engineering and support duties as required in a dynamic environment to meet evolving mission and customer needs.

Requirements:

• Must have TS SCI CI Poly
• Candidate must have Masters and 6-10 years of prior relevant experience, or Bachelors and 8-12 years of prior relevant experience. May possess a doctorate in technical domain in lieu of years of experience.
• Additional required qualifications include: Compliance with Department of Defense (DoD) 8140 Information Assurance Technical (IAT) Level 2.
• The candidate must be highly motivated. Able to work independently with both local and geographically diverse team members. Using effective time management skills to meet deliverable timelines.
• Must have at least 1 year of relevant Service Now experience that can be a combination of work history, education, and training.
• The candidate must also have experience working within concept, design, engineering, production, and sustainment phases of Service Now system development lifecycle.
• Experience with at least one of (Agile, Scrum, SDLC).
• Must be able to work with minimal supervision to perform complex technical tasks and work with others effectively.
• Must be able to process and analyze information and trouble calls submitted by a customer (e.g., system administrator, developer, security specialist), make determinations, and provide and implement solutions.
• Strong communication skills for working effectively with clients and team members.
• Strong organizational skills, including attention to detail, multitasking and critical thinking skills
• Skilled in working within a team environment within a professional office setting.
• Thrive within a highly dynamic and changing environment while adapting and managing shifting customer priorities.
• Strong written and verbal communication skills.
• Working knowledge of Service Now or other ITSM platforms.
• Experience working with Microsoft Office products: Word, Excel, PowerPoint, and Outlook.

DESIRED:

• Certification: Service Now Certified System Administrator.
• Cross platform and integration experience. Windows, Linux, Android, Juniper, and Cisco.
• Experience developing and scripting within Service Now using languages such as JavaScript, as well as integrating
• Service Now with external systems using Java, Python, Perl, or PowerShell.
• Experience with databases including MariaDB.

If you're looking for comfort, keep scrolling. At Leidos, we outthink, outbuild, and outpace the status quo — because the mission demands it. We're not hiring followers. We're recruiting the ones who disrupt, provoke, and refuse to fail. Step 10 is ancient history. We're already at step 30 — and moving faster than anyone else dares.

Original Posting:

March 10, 2026

For U.S. Positions: While subject to change based on business needs, Leidos reasonably anticipates that this job requisition will remain open for at least 3 days with an anticipated close date of no earlier than 3 days after the original posting date as listed above.

Pay Range:

Pay Range $107,900.00 - $195,050.00

The Leidos pay range for this job level is a general guideline only and not a guarantee of compensation or salary. Additional factors considered in extending an offer include (but are not limited to) responsibilities of the job, education, experience, knowledge, skills, and abilities, as well as internal equity, alignment with market data, applicable bargaining agreement (if any), or other law.