Resume

NASEEM RAHMAN
469-786-7422 |     naseemra@gmail.com |  LinkedIn: linkedin.com/in/naseemr

Professional Summary

Telecom professional with over two decades of progressive experience in wireless network technologies, including GSM, UMTS, LTE (4G), VoLTE, and 5G Core. Expert in lab certification of vendor software releases, network integration, and cross-functional project leadership. Proven ability to troubleshoot complex core network issues, manage vendor relations, and lead innovations across EPC, IMS, and cloud-based virtualized environments.

Core Competencies

  • Technologies: GSM/GPRS/EDGE/UMTS/LTE/5G/IMS/SMS
  • Protocols: Diameter, HTTP, SCTP, MAP, ISUP, TCAP, CAP2/3
  • Network Elements:  HSS, HLR, AAA, UDM, AUSF MSC, MGW, KMS
  • Virtualization & Tools: RedHat OpenStack, vHSS, Tenable, Wireshark, ALM QC, Jira
  • Specialties: Network Design & Troubleshooting, Lab Certification, VNF Deployments
  • Soft Skills: Project Leadership, Vendor Collaboration, Documentation, Cross-Functional Communication

Professional Experience

AT&T Mobility – Redmond, WA
Principal Member of Technical Staff | Oct 2006 – Mar 2025

  • Led multiple CTO projects from concept to deployment, including lab certification and core network compliance.
  • Supervised lab SDM (Subscriber Data Management) teams in the testing and validation of HSS/HLR/AAA software releases.
  • Authored test plans, design documents, and implementation guides for core network elements.
  • Performed vulnerability scanning (Tenable) and resolved compliance issues.
  • Provided Tier 4 technical support and collaborated with teams like PCRF, E911, Roaming, CALEA, and MCPTT.
  • Key Projects:
    • Duplicate eSIM Activation – Enabled eSIM reuse for factory-reset devices.
    • Project Polaris – Contributed to development of space-based cellular broadband using standard smartphones.
    • vHSS Certification – Tested and validated VNF on RedHat OpenStack platform.
    • Extended Notification – Enabled IoT subscriber log forwarding to remote servers.
    • NIR Certification – Enabled bootstrapped SIM activation.
    • VoWiFi Integration – Brought Wi-Fi calling capability to LTE via non-3GPP access using KMS (Key management server that generate pseudonym)
    • Vendor RFP & Evaluation – Assessed and selected VNF solution providers.

Nortel Networks – Richardson, TX
Member of Scientific Staff – UMTS Core | Nov 2003 – Sep 2006

  • Conducted end-to-end verification for UMTS features including SMS and supplementary services.
  • Ensured 3GPP compliance and commercial readiness for customer trials and deployments.
  • Key Projects:
    • National UMTS Roaming Deployment
    • VoIP Dry Run for CTC/MII (China Trial)
    • ATCA MSC Integration (Release 19)

Member of Scientific Staff – GSM Product Test | 1999 – 2003

  • Led GSM product integration, regression, and automation testing.
  • Conducted third-party interoperability testing with carriers and equipment vendors.
  • Key Projects:
    • GSM-R Integration for High-Speed Rail (Cologne–Frankfurt)
    • CAMEL Phase 3 Enhancements (CAP3)
    • Wireless Priority Services (WPS) Deployment

MCI WorldCom – Richardson, TX
Test Engineer III | 1998 – 1999

  • Designed and executed test plans for Storage and Verification Element (SAVE).
  • Installed and upgraded SAVE software in live production networks.

Education

Bachelor of Science in Mathematics
University of Texas at Arlington, Arlington, TX | 1998