**Job Description:** AT&T Global Public Sector is a trusted provider of secure, IT Managed Services to the Intelligence Community. 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. TAC2O (Technology Architecture for Command-and-Control Operations) is a five-year Task Order under the Helios IDIQ awarded to AT&T in December 2023. AT&T’s TAC2O contract provides a team of IT specialists who perform IT Engineering, Cybersecurity; Communications Security, Systems Administration, Software Development, SharePoint Development and Administration, and Program Management services supporting sensitive technical collection and exploitation missions and focused on driving optimization of performance and cost over time across multiple security domains. AT&T has an opening for a Senior Windows Systems Engineer for the TAC2O program. This position will be providing managed IT support of TAC2O systems for high-priority defense intelligence collection needs. The job duties of the Senior Windows Systems Engineer are as follows: + Plans, designs, and implements infrastructure changes and system upgrades. + Manages and troubleshoots multiple VMware environments. + Provides Windows Server and Linux administration, maintenance, and troubleshooting. + Creates STIG compliant images for Windows Desktop, Windows Server, and Linux OS. + Creates, tests, and deploys software packages using software deployment products such as SCCM, PDQ, etc. + Provides advanced level administration and troubleshooting of Active Directory, GPO, DNS, DHCP, and Domain Controllers. + Provides expert level support and mentoring for Mid and Junior System Administrator personnel. + Develops and maintains installation and configuration procedures for system and software changes. + Utilizes scripting to automate common tasks. + Performs hardware maintenance/repair activities. + Ensures proper planning and execution of major projects/maintenance activities. Required Clearance: TS/SCI with poly (#ts/sci) (#polygraph) Required Qualifications: + Ability to write scripts using PowerShell and/or Bash. + Experience managing VMware, Nutanix, and other types of enterprise level Virtual Infrastructures. + Proficient in managing and troubleshooting Active Directory and Group Policy Object (GPO). + At least 8 years of relevant experience. + Must presently be 8570 compliant (IAT Level 2 preferred); must be 8570 compliant (IAT Level 2) by date of security indoctrination with any necessary continuing education (CE) for certification. Desired Qualifications: + Linux OS (CentOS, RHEL) administration. + Satellite server administration. + Ansible playbook writing. + Implementing STIGs. + Experience supporting a software configuration management and development environment. Our Senior Windows Systems Engineer 's earn between $150,000-$205,000. 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 where available) and AT&T phone **Weekly Hours:** 40 **Time Type:** Regular **Location:** Reston, Virginia 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 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