Santiago Lacalle Puig

Senior Research Infrastructure Engineer at Imperial College London | Linux | HPC | Ansible | Slurm

Location:London, United Kingdom (London, United Kingdom)

Timezone:Europe/London

Experience:10 Years

Direct Rate

$55–$115/ hour (USD)

Available for Projects

No middleman platform markups. Direct contact.

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About & Engineering Approach

Lead server and HPC infrastructure engineer with 10+ years of experience in Linux systems administration, automation, network and storage configuration. Manages a large-scale Linux server platform at Imperial College London: RHEL 8/9 administration on bare-metal servers and VMware virtualization (clusters with 1,000+ nodes), maintenance of GPFS / IBM Spectrum Scale parallel filesystems (500+ systems), Mellanox InfiniBand / RDMA networking, Slurm and PBS workload schedulers. Automates configurations with Ansible, Terraform, and GitLab CI/CD, provides monitoring via Grafana and InfluxDB.

Core Technologies & Competencies

Primary Specializations

Server Administration

All Technologies & Tools

Server Administration

Red Hat Enterprise Linux

Rhel 8 9

Debian Ubuntu

Vmware Vsphere

Esxi

Ansible

Terraform

Git

Gitlab Cicd

Bash

Python

Slurm

Pbs

Hpc 1

000 Nodes

Gpfs Ibm Spectrum Scale

Mellanox Infiniband

Rdma

San Nas

Grafana

Influxdb

Servicenow

Commercial Experience

Senior Research Infrastructure Engineer @ Imperial College London (Full-time)

2026-05-01 — Present

Supporting large-scale Linux HPC platforms, administering 1,000+ RHEL nodes, configuring Slurm, Ansible automation, GPFS storage.

Senior Research Computing Analyst @ Imperial College London (Full-time)

2023-06-01 — 2026-05-01

Leading the HPC infrastructure support team for 7,000+ users, tracing failures at host and network level, resolving incidents.

Research Computing Analyst @ Imperial College London

2017-10-01 — 2023-05-01

Administering Linux servers, supporting users and compute queues.

Selected Portfolio & Deliverables

Infrastructure monitoringScience and education

HPC Cluster Monitoring Dashboard

Centralized monitoring dashboard for a 1000+ node RHEL cluster with CPU load, memory, Slurm queue, and InfiniBand network health metrics.

grafana

influxdb

slurm

rhel

python

Infrastructure automationScience and education

Automated RHEL Provisioning with Ansible

Automated deployment and configuration of RHEL 8/9 servers in a VMware environment, including network, user, and base service setup.

ansible

rhel

vmware-vsphere

gitlab-cicd

Data storage migrationScience and education

Parallel Storage Migration to Spectrum Scale

Migration of 2+ PB of data from a legacy filesystem to IBM Spectrum Scale without stopping cluster compute jobs.

ibm-spectrum-scale

gpfs

slurm

bash

Vetting Standards

Identity & Commercial Track RecordVerified past employment and client references.

Code & Architecture AuditAssessed on production code standards and type safety.

Direct Contract SupportNo platform lock-in. Work directly with clear terms.

Languages

Verified Links

LinkedIn Profile

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