Senior Cybersecurity Endpoint Security and Infrastructure Security (EDR and

AT&T; India; On-site; INR 1,800,000 - 3,000,000; Full time

Job summary

AT&T is seeking a Senior Cybersecurity Architect to design, implement, and maintain endpoint and infrastructure security strategies. You will lead the deployment of SentinelOne, Proofpoint, Guardicore, VPN, and DLP across diverse environments including Linux, Windows, macOS, VDI, and Kubernetes clusters, collaborating with SOC/IR teams to enhance detection and response capabilities.

The role requires 10+ years in cybersecurity with 4–6 years in large-scale endpoint protection architectures,

Qualifications

• 10+ years in cybersecurity roles.
• 4–6 years architecting large-scale endpoint/infrastructure protection.
• Strong knowledge of Linux, Windows, and macOS administration.
• Experience with VDI (VMware, Citrix, Azure Virtual Desktop).
• Familiarity with NIST, CIS, MITRE ATT&CK and security standards.
• Proficiency in automation: PowerShell, Bash, Python; CI/CD; API integration.

Responsibilities

• Architect and deploy SentinelOne, Proofpoint, Guardicore, VPN, and DLP solutions at scale.
• Define, optimize, and enforce security policies across OS and devices.
• Collaborate with SOC and IR teams to tune detections and respond to incidents.
• Lead integration of security tools with automation and APIs.
• Produce architecture diagrams, runbooks, and best practices guides.
• Provide training to IT, DevOps, and security teams on endpoint security hygiene.

Skills

SentinelOne

Proofpoint

Guardicore

VPN

DLP

Endpoint security

Automation

Python

PowerShell

CI/CD

Tools

Kubernetes

VMware

Azure Virtual Desktop

Citrix

Linux

Windows

Job description

Role Senior Cybersecurity Endpoint Security and Infrastructure Security (SentinelOne, Proofpoint, Guardicore, VPN and DLP security solutions)

About the Company:

Join AT&T and reimagine the communications and technologies that connect the world. Our Chief Security Office ensures that our assets are safeguarded through truthful transparency, enforce accountability and master cybersecurity to stay ahead of threats. Bring your bold ideas and fearless risk-taking to redefine connectivity and transform how the world shares stories and experiences that matter. When you step into a career with AT&T, you wont just imagine the future-youll create it

About the Role:

Our team is seeking an experienced technologist to join our Cybersecurity team.

Working as a Senior Cybersecurity within CSO, you will work with application owners, business partners, and other CSO teams; to design, implement, and maintain AT&T endpoint and infrastructure security strategy. Focusing on protecting endpoints from threats (E.g. phishing, malware, data breaches) enact new security standards, and research emerging standards and protocols. The role involves creating, maintaining and enforcing robust endpoint security policies that align with AT&T's business needs and security best practices.

Roles & Responsibilities:

The Individual in this role will

Architect and Lead SentinelOne Deployments:

Design and implement SentinelOne, Proofpoint, Guardicore, VPN and DLP security solutions for a wide range of infrastructure and endpoints, ensuring scalable, resilient, and effective protection across:

• Multiple Linux distributions (RHEL, Ubuntu, CentOS, etc.)
• Windows Server (various versions)
• Windows and MacOS endpoints
• Virtual desktop infrastructure (HVDs)
• Kubernetes clusters running on-prem and in cloud environments

Integration & Automation:

Integrate with other security solutions and automation using APIs.

Security Policy Management:

Define, optimize, and enforce SentinelOne, Proofpoint, Guardicore, VPN and DLP security policies for different operating systems and device types, balancing security posture with operational requirements.

Threat Detection & Incident Response:

Collaborate with SOC and IR teams to tune SentinelOne, Proofpoint, Guardicore, VPN and DLP detections. Assist in the response to threats and the investigation of security incidents across the environment.

Cross-Platform Expertise:

Provide deep technical expertise in handling endpoint security for heterogeneous systems, troubleshooting compatibility issues, and optimizing performance.

Technical Leadership & Documentation:

Serve as the subject matter expert for endpoint security, producing architectural diagrams, technical documentation, runbooks, and best practices guides.

Collaboration & Training:

Partner with IT, DevOps, and security teams to ensure seamless integration with existing infrastructure and provide training on SentinelOne, Proofpoint, Guardicore, VPN and DLP usage and endpoint security hygiene.

Continuous Improvement:

Stay updated on emerging threats, SentinelOne, Proofpoint, Guardicore, VPN and DLP product updates, and industry best practices. Recommend enhancements to improve detection and response capabilities.

Required Skills:

Minimum 10+ years in cybersecurity roles, with at least 4-6 years architecting and supporting large-scale endpoint and infrastructure protection platforms (preferably SentinelOne, Proofpoint, Guardicore, VPN and DLP).Operating system and Infrastructure Proficiency:Experience with Linux (multiple distros), MacOS and Windows server/client administrationKnowledge of Virtual desktop infrastructure (VMware, Citrix, Azure Virtual Desktop)Knowledge of Kubernetes and application deployment.Security Frameworks: Familiarity with NIST, CIS, MITRE ATT&CK, and other security standards.Automation and coding: PowerShell, Bash, Python; CI/CD (GitHub/GitLab/Azure DevOps); API integration skills.Experience with the Singularity platform (EPP/EDR/XDR) is preferred.Familiarity with OT/IoT discovery and segmentation; network isolation strategies for branch and edge.Certified in Engineering and Administration areas of SentinelOne, Proofpoint, Guardicore, VPN and DLP, is highly desirable.The candidate must have excellent analytical and problem-solving skills, be self-motivated and work independentlySense of urgency and attention to detail.Should be flexible to work on weekends.Should be flexible to provide coverage in US morning hours.

Desired Skills:

Familiarity with applying Artific .