Mark Ryan
Senior Network Engineer at Intel Corporation
Leixlip, Ireland
Summary
👤
Senior🎓
Top SchoolMark Ryan is a Senior Network Engineer based in Leixlip, Ireland with 14 years of hands-on experience designing, deploying and operating complex enterprise and data center networks for global clients including Intel and MacStadium. He specializes in spine-and-leaf architectures, Cisco ACI and Nexus/Catalyst platforms, and has driven production-grade implementations spanning factories, large campuses and multi-tenant data centers with a strong focus on security and operational excellence. Known for a data-driven troubleshooting approach and ITIL-informed change management, he has repeatedly reduced incident risk through robust SOPs and proactive operational tooling. Beyond networking, Mark contributes to high-performance open-source projects—optimizing math kernels in Eigen and RISC-V runtime paths in the Go project—demonstrating low-level performance expertise uncommon in infrastructure engineers. He combines 24/7 operational readiness with project delivery leadership, making him effective both on-call and in multi-site rollout programs. Educated in Information Technology at the University of Limerick, he brings a pragmatic blend of systems thinking and code-level optimization to networking challenges.
14 years of coding experience
17 years of employment as a software developer
Bachelor’s Degree Information Technology, Bachelor’s Degree Information Technology at University of Limerick
Github Skills (24)
benchmark10
assembly10
c-language10
avx10
matrix-multiplication10
risc-v10
benchmarking10
go10
performance-optimization10
assemble10
assembler10
cprogramming-language10
linear-algebra10
memory-management9
compiler-optimization9
Programming languages (14)
Github contributions (5)
eigenteam/eigen-git-mirror
May 2018 - Jan 2019
THIS MIRROR IS DEPRECATED -- New url: https://gitlab.com/libeigen/eigen
Role in this project:
Performance Engineer & Systems Programmer
Performance Engineer & Systems ProgrammerContributions:11 commits in 7 months
Contributions summary:Mark primarily contributed to performance optimization and bug fixing within the Eigen library, specifically targeting AVX and AVX512 instruction sets. Their work involved identifying and resolving issues related to incorrect alignment settings and incorrect implementations of mathematical functions like `psqrt` and `ptranspose` on AVX512 machines. Additionally, the user addressed performance bottlenecks in matrix multiplication operations, contributing to the speedup of small, dynamically sized matrix multiplications, and ensuring the correct behavior of tensor contractions. These changes involved code modifications across core files within the Eigen library to leverage advanced processor features.
lapackeigenvalueslinear-algebrasparse-matrixeigen
golang/go
Apr 2016 - Feb 2025
The Go programming language
Role in this project:Back-end Developer & Performance Engineer
Back-end Developer & Performance EngineerContributions:45 comments, 3 issues in 8 years 11 months
Contributions summary:Mark's contributions primarily focused on optimizing the Go programming language's runtime and core libraries for the RISC-V architecture. They addressed alignment issues in memory clearing and comparison routines, resulting in significant performance improvements, particularly for unaligned memory accesses. The user also implemented and integrated new benchmarks to validate and measure the impact of their optimizations. Furthermore, the user optimized compiler code, improving right shift operations for uint32 and int32 values, thereby reducing the number of instructions needed.
golanggopluscompilerprogramming-languageinterpreter
Find and Hire Top DevelopersWe’ve analyzed the programming source code of over 60 million software developers on GitHub and scored them by 50,000 skills. Sign-up on Prog,AI to search for software developers.