Senior Systems Administrator III (Government)

Senior Systems Administrator III (Government) This position requires office presence of a minimum of 5 days per week and is only located at customer's site. No relocation is offered. AT&T Global Public Sector is a trusted provider of secure, IP enabled, cloud-based, network solutions and professional services to the Federal Government. We are dedicated to recruiting, developing and empowering a diverse, high-performing workforce that is passionate about what they do, committed to our shared values and dedicated to our customers' mission. AT&T has an opening for a Senior System Administratorto support operations by maintaining, documenting, and administering enterprise IT systems. This role is the Senior System Administrator will deliver helpdesk and troubleshooting support, oversee problem resolution, and maintain system configurations to ensure availability, reliability, and security.

Job Duties/Responsibilities:

• Maintain and develop system documentation to include product guides/manuals, SOPs, work logs and the Helpdesk ticket system
• Provide system administration support
• Provide maintenance and support of existing software (problem report/trouble tick resolution) and hardware
• Provide helpdesk support for collecting, controlling and disseminating, documenting and resolving all IT related questions and problems.

Clearance Requirements:

TS/SCI (#tssci)

Required Qualifications:

• Bachelors degree in related field, 8 years of relevant experience
• Security+ or relevant certification

Desired Qualifications:

Demonstrate understanding of Red Hat Linux, Trusted Linux, Windows 10, VMware Our Senior Systems Administrator III's earn between $89,200 - $207,900. Not to mention all the other amazing rewards that working at AT&T offers. Individual starting salary within this range may depend on geography, experience, expertise, and education/training. Joining our team comes with amazing perks and benefits:

• Medical/Dental/Vision coverage
• 401(k) plan
• Tuition reimbursement program
• Paid Time Off and Holidays (based on date of hire, at least 23 days of vacation each year and 9 company-designated holidays)
• Paid Parental Leave
• Paid Caregiver Leave
• Additional sick leave beyond what state and local law require may be available but is unprotected
• Adoption Reimbursement
• Disability Benefits (short term and long term)
• Life and Accidental Death Insurance
• Supplemental benefit programs: critical illness/accident hospital indemnity/group legal
• Employee Assistance Programs (EAP)
• Extensive employee wellness programs
• Employee discounts up to 50% off on eligible AT&T mobility plans and accessories, AT&T internet (and fiber w available) and AT&T phone

Weekly Hours:

40

Time Type:

Regular

Location:

Columbia, Maryland It is the policy of AT&T to provide equal employment opportunity (EEO) to all persons regardless of age, color, national origin, citizenship status, physical or mental disability, race, religion, creed, gender, sex, sexual orientation, gender identity and/or expression, genetic information, marital status, status with regard to public assistance, veteran status, or any other characteristic protected by federal, state or local law. In addition, AT&T will provide reasonable accommodations for qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made. Job

ID R-107692

Date posted 04/21/2026