AT&T logo

Telephony Systems Administrator (SA1.5) (Government)

AT&T

Columbia, MDFull-time$89–129K/yrSeen 2w agoSeen in employer's feed 5 days ago

Most applications go out cold — see where you stand first. No sign-up to start.

You apply on the employer's site, with no Olive account needed.

Watch jobs like this.

Don't just apply. Show up ready.

Olive works from this exact posting.

At a glance

Compensation
$89–129K/yr
Location
Columbia, MD
Schedule
Full-time
Work Authorization
US work authorization required

Olive lists jobs from US employers, including remote roles you can work from the United States.

Requirements

Credentials this posting asks for.

DoD 8570 IAM Level 2TS/SCI clearance

Job overview

AT&T Global Public Sector is seeking a Telephony Systems Administrator to support critical communications infrastructure for government customer operations. The role administers enterprise Cisco Unified Communications Manager and related systems, maintains voice network performance and documentation, and supports telecommunications requests and troubleshooting. It is full-time and onsite five days per week in Columbia, Maryland. A TS/SCI clearance with polygraph and DoD 8570 IAM Level 2 are required.

Skills & qualifications

RequiredNice to have

Skills

Cisco Unified Communications ManagerTDM and VoIP AdministrationCisco Voice ImplementationData NetworkingH.323SIPCisco UCSVoice GatewaysVirtualizationESXiTechnical TroubleshootingSecurity MonitoringCollaboration

Qualifications

Seven Years SA ExperienceBachelor's in Listed Disciplines or Five Additional SA YearsTS/SCI With PolygraphDoD 8570 IAM Level 2

Benefits

Medical Insurance
Dental Insurance
Vision Insurance
401(k) Match
Tuition Assistance
Paid Time Off
Parental Leave

Full job description

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.

RIS I is the delivery of regional IT services to the end user. We offer support of end user devices including desktop, workplace peripherals, and voice and video devices. We support local and campus area networks, including wireless and cable plant.

Join a mission-focused team supporting critical communications infrastructure. We are seeking a detail-oriented Telephony System Administrator who brings strong technical troubleshooting, security monitoring, and collaboration skills to help maintain reliable, compliant, and secure communications systems for customer operations.

This is a full-time onsite role based in the location(s) posted and is performed from the designated work location five days per week. No relocation is offered.

Description of Job Duties/Responsibilities:

  • Provide overall system administration for an enterprise-wide Cisco Unified Communications Manager and related systems.

  • Plan regular maintenance tasks including updates and upgrades.

  • Maintain current and accurate documentation of system configurations.

  • Design, administer, and analyze corporate dial plans and traffic routes for voice network structure.

  • Administer and monitor voice systems for performance and SLA attainment.

  • Provide support as needed to lower tier break/fix resolution and move/add/change/deactivation requests for all telecommunications systems.

Required Clearance: TS/SCI with polygraph. (#ts/sci) (#polygraph)

Required Qualifications:

Seven (7) years of experience as an SA in programs and contracts of similar scope, type, and complexity are required. Bachelor’s degree in Math, Science, Engineering, Statistics, Engineering Management or a related discipline from an accredited college or university is required. Five (5) years of additional SA experience may be substituted for a Bachelor’s degree.

  • Experience with the configuration and administration of common TDM and VOIP telephone call manager systems, such as the Nortel Meridian line of PBXs and Cisco Unified Call Manager.

  • Large-scale implementation experience with Cisco Voice in a multi-cluster environment and data networking infrastructure.

  • Working knowledge of H.323 and SIP. Familiar with Cisco UCS platforms, voice gateways, virtualization, and ESXi.

  • DoD 8570 IAM Level 2 required.

Ready to join our team? Apply today!

Our Telephony Systems Administrator (SA1.5) (Government)

earns $89,200 - $129,400

yearly. 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) *Pro-rated when working less than 40 hrs/wk.

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 where available) and AT&T wireline phone

Weekly Hours:

40

Time Type:

Regular

Location:

Columbia, Maryland

AT&T and its subsidiaries are committed to equal employment opportunity. All hiring, promotion, and other employment decisions remain merit-based and free from discrimination on the basis of race, color, religion, religious creed, national origin, ancestry, age, sex, sexual orientation, gender, gender identity, gender expression, physical disability, mental disability, pregnancy, medical condition, genetic information, marital status, citizenship status, military status, veteran status, or any other characteristic protected by federal, state, or local laws. In addition, AT&T will provide reasonable accommodations to qualified individuals with disabilities. AT&T is a fair chance employer and does not initiate a background check until an offer is made. Click here (https://urldefense.com/v3/\_\_https:/www.eeoc.gov/poster\_\_;!!BhdT!gVgkRvpoFXvxCPguQlKOpna1E9V2xmnpQvxcjhTWaBpnwCl09S3N6PYnLgM6kQjmJXAYFLihSQ4W3Sw2boE9zgEA$) to learn more or request an application accommodation here (https://urldefense.com/v3/\_\_https:/www.att.jobs/accommodation/\_\_;!!BhdT!gVgkRvpoFXvxCPguQlKOpna1E9V2xmnpQvxcjhTWaBpnwCl09S3N6PYnLgM6kQjmJXAYFLihSQ4W3Sw2bszyLYN3$) .

AT&T will consider for employment qualified applicants in a manner consistent with the requirements of federal, state and local laws

We expect employees to be honest, trustworthy, and operate with integrity. Discrimination and all unlawful harassment (including sexual harassment) in employment is not tolerated. We encourage success based on our individual merits and abilities without regard to race, color, religion, national origin, gender, sexual orientation, gender identity, age, disability, marital status, citizenship status, military status, protected veteran status or employment status

How this job compares

Set against the 2,465 open Systems Administrator jobs on Olive Jobs, counted November 6, 2026.

Pay
  • This posting$89–129K/yr
  • Maryland median$104–171K/yr128 salary ranges
  • US median$95–150K/yr1,509 salary ranges

This range's midpoint, $109K, is 22% below the Maryland median midpoint ($139K) — in the lowest quarter of Systems Administrator salary ranges in Maryland.

Openings
Olive Jobs lists 175 open Systems Administrator jobs in Maryland and 2,465 across the US. 4% of them nationwide are listed as remote or flexible.
Hiring the most in Maryland
Experience
This posting asks for at least 7 years of experience — more than three in four Systems Administrator postings that state a minimum ask for (median 5 years, across 2,060 postings).
Education
361 of the 2,465 open Systems Administrator jobs (15%) ask for a bachelor's degree or higher.

Counted across the open, public US postings on Olive Jobs on November 6, 2026. Pay medians are the middle values of the low ends and of the high ends of postings that list both ends of a range in the same cadence (a yearly salary or an hourly rate); a range's midpoint is halfway between its ends. Pay and experience figures resting on fewer than 20 postings are left out.

Prepare for this role

You've read the whole posting — now see how you match it.