Senior Information Systems Security Engineer; Government
Listed on 2026-09-01
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IT/Tech
Cybersecurity, Systems Engineer, Information Security & Data Protection, IT Consultant
This position requires office presence of a minimum of 5 days per week and is only located at customer's site.
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 Information Systems Security Engineer (ISSE) for the TAC2O systems program. This position will be providing managed IT support of TAC2O systems for high-priority defense intelligence collection needs.
Duties/Responsibilities
:
- Provides technical expertise to ensure the network systems meet DIA C&A and IA requirements and are properly certified and accredited
- Responsibilities are full-time on customer’s onsite and will cover classified programs and Special Access Programs (SAP). No Telework.
- Designs, develops, and recommends integrated security system and physical control solutions that will ensure proprietary/confidential data and systems are protected
- Assist team in DIA’s Authorization and Accreditation (A&A) process using RMF across the design lifecycle for classified systems obtaining and maintaining Interim Authorization to Test (IATT), Authority to Connect (ATC) and Authorization to Operate (ATO)
- Offers technical engineering services for the support of integrated security systems and solutions, managing information-related risks effectively
- Works closely with the client during the strategic design process to translate security and business requirements into actionable technical designs
- Configures and validates secure systems and physical controls, and tests security products and systems to detect security weakness
- Develop comprehensive system test plans (STP) to assess the security posture of the information systems
- Analyze scan results and security findings to prioritize remediation efforts and implement corrective measures
- Participate in incident response activities and assist in the resolution of security incidents as needed
Required Clearance:
TS/SCI, with Poly (#tssci) (#polygraph)
Required Qualifications:
- Exhibits advanced Windows administration capabilities and Linux proficiency for optimal system management
- Security credentials, certifications, and experience commensurate with the job description
- Practical experience deploying, maintaining, and troubleshooting security tools
- Demonstrates the ability to critically assess current practices, identify deficiencies, propose innovative solutions, and effectively implement these improvements
- Thrives in a fast-paced, complex environment; displays exceptional poise and an unwavering commitment to hard work
- Displays excellent problem-solving abilities and attention to detail
- Experience with each of the following security tools:
Assured Compliance Assessment Solution (ACAS), Trellix, Splunk, and Security Technical Implementation Guide (STIG)’s - Collaborate with stakeholders to identify security requirements and ensure alignment with organizational objectives
- Stay abreast of the latest security trends, technologies, and best practices to continually enhance the security posture of the information systems
- A Bachelor’s Degree from an accredited institute in an area applicable to this position and four (4) years of relevant experience
- An additional four (4) years of relevant experience may be substituted for the bachelor’s degree
- 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:
- Familiar with tiered security environments (U, S, TS)
- Deep understanding of Trellix antivirus suite of products
- Knowledge of Splunk architecture and experience structuring multi-level queries
- Windows expert – capable of advanced Powershell scripting and general administrative functions
- Experience with one or more commercial government cloud service provider’s system accreditation process
- Experience as a Cybersecurity Control Assessor for SAP
- Expe…
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