Daniel Michael Aloysius
London,UK
Summary
Senior Telecommunications Engineer with 10 years of global experience. Specializes in End-to-End Network Validation, Carrier Acceptance, and Technical Program Management. Expert in protocol-level troubleshooting across 4G, IMS and 5G(SA/NSA) and emerging technologies like NTN (Satellite) and Open RAN.
Overview
10
10
years of professional experience
4
4
years of post-secondary education
1
1
Certification
Work history
Pixel Carrier Engineer
Google (via Marquis Technologies)
London, UK
11.2024 - 01.2026
- Advanced Feature Validation: Lead field validation for NTN (Satellite backhaul) focusing on UE-to-Satellite synchronization, ephemeris data handling, and long-delay RTT optimizations and Private Networks, ensuring seamless UE-to-Network synchronization.
- RAN & Protocol Troubleshooting: Perform deep-dive Root Cause Analysis (RCA) on logs across UE, RAN, and Core, debugging S1AP and SCTP signalling for network attachment.
- Small Cell & Dense Urban Testing: Execute rigorous testing in challenging environments, including Underground Wi-Fi and dense public infrastructure scenarios.
- 5G Performance Optimization: Validate VoNR and FR1/FR2 performance, utilizing shannon and QXDM to optimize handover and throughput KPIs.
- Stakeholder Interface: Serve as the technical lead between internal engineering and external carriers to ensure device-network interoperability.
Senior WW Field Engineering
Apple (via Tech Mahindra)
Milan, Italy
11.2022 - 11.2024
- Carrier Acceptance & IMS: Led field testing and GCF TS11 validation; using XCAL to ensure devices achieved Technical Acceptance (TA) on schedule.
- Satellite Connectivity Validation: Supported early-stage field testing for Satellite-based Emergency Services, validating L-band signal acquisition and UI-guided antenna alignment.
- Protocol-Level Debugging: Utilized Wireshark for packet inspection of Diameter and GTP protocols to resolve authentication and data session failures.
- Infrastructure Compliance: Identified firmware gaps against 3GPP Rel 15/16 standards, working with R&D to align with carrier-specific RAN configurations.
- KPI Analysis: Verified network KPIs and functional stability across diverse environmental conditions.
Senior Field Test Engineer
Marquis Technologies
Rome, Italy
12.2016 - 11.2022
- Multi-Chipset Testing: Worked on QA, Field, and Lab testing for major chipset vendors including Qualcomm, Exynos, Spreadtrum, and MediaTek.
- RAN & Core Interoperability: Conducted testing on MIMO and multi-frequency components (FR1/FR2) utilizing Viavi TeraVM for network emulation and stress testing.
- Backhaul & Protocol Awareness: Verified S1-U and X2 interface handovers, ensuring minimal packet loss during inter-cell transitions.
- Comprehensive Protocol Testing: Conducted GCF TS11 testing on 5G (NSA/SA), EUTRAN, VoLTE, IP-CANI, UTRAN, and GSM for Mobile/Modem and NB-IoT testing across Europe, SEA, and APAC regions.
- Log Analysis: Expertly captured and analyzed logs using QXDM, QCAT, ELT, ShannonDM, Spreadtrum Catcher, and Wireshark to identify network parameters including throughput, latency, and signal quality.
- Operator Approval: Managed end-to-end Carrier Acceptance cycles, executing test plans to evaluate the functionality and performance of FR1 and FR2 components.
- Team Leadership: Managed the execution of network testing projects, including resource allocation, scheduling, and task assignment for the field team.
- Mentorship: Conducted regular performance evaluations, provided coaching/mentoring, and facilitated professional development opportunities for team members.
- Reporting: Prepared detailed test reports, documenting findings, test results, and recommendations for network optimization.
Network Administrator
Ricoh Limited
Chennai, India
11.2015 - 08.2016
- Designed and maintained network infrastructure, configuring Cisco switches/routers and ensuring optimal availability.
- Conducted network monitoring and troubleshooting to resolve connectivity issues efficiently.
Education
Bachelor of Engineering - Electronics and Communication Engineering
Kings Engineering College
Chennai 01.2011 - 01.2015
Certification
Telecommunications (4G/3G/2G) | 2016
Technical Skills
- Protocols & Architecture: Deep-dive analysis of SIP, Diameter, GTP, S1AP, SCTP, and RRC/RLC/MAC layers.
- Advanced RAN: Experience with vRAN, Open RAN (CU/DU/RU), MIMO, and Small Cell deployments.
- Chipset & Debug Tools: Wireshark (PCAP), QXDM, QCAT, XCAL, Shannon DM, ELT, and ADB.
- Carrier Certification: GCF/PTCRB, Carrier Acceptance and OMADM.
- Core Competencies: Technical Program Management (TPM), Defect Triage & Root Cause Analysis, Compliance Matrix Management, NPI Launch Readiness.
Timeline
Pixel Carrier Engineer
Google (via Marquis Technologies)
11.2024 - 01.2026
Senior WW Field Engineering
Apple (via Tech Mahindra)
11.2022 - 11.2024
Senior Field Test Engineer
Marquis Technologies
12.2016 - 11.2022
Network Administrator
Ricoh Limited
11.2015 - 08.2016
Bachelor of Engineering - Electronics and Communication Engineering
Kings Engineering College
01.2011 - 01.2015