OT Systems Engineer
Role Summary
The OT Systems Engineer supports the design, implementation, and operation of secure, resilient systems infrastructure for hyperscale data centre OT environments in Siziano, Milan. The role focuses on Operational Technology systems including Building Management Systems (BMS), Electrical Power Monitoring Systems (EPMS), and other critical site infrastructure.
Working closely with internal technology, engineering, operations, and vendor teams, you will help maintain system performance, reliability, and security while supporting troubleshooting, documentation, and continuous improvement in a high-availability environment. This is a hands-on, site-based role requiring regular presence across local data centre sites in the Siziano/Milan area.
Key Responsibilities
- Deploy, configure, maintain, and optimise OT systems infrastructure across critical data centre environments.
- Support Windows, Linux, VMware, and virtualised platforms to maintain performance, resilience, security, and service continuity.
- Monitor system performance, identify issues or bottlenecks, and implement improvements to support high availability.
- Troubleshoot complex incidents, work with internal teams and vendors, and help drive root cause resolution and preventive actions.
- Support monitoring, patching, backup, maintenance, and documentation activities across OT systems.
- Apply security, operational, and regulatory best practices in a high-availability environments.
- Participate in out-of-hours or emergency support when required to maintain service continuity.
What You’ll Bring
- Experience as a Systems Engineer in an enterprise, critical infrastructure, or data centre environment.
- Strong hands-on knowledge of Windows and Linux systems, VMware-based virtualisation, and secure, high-availability infrastructure.
- Experience with troubleshooting, systems administration, and operational support in complex technical environments.
- Understanding of security best practices, patching, backup, and system resilience.
- Experience with scripting or automation tools such as PowerShell or Ansible is beneficial.
- Familiarity with OT systems such as BMS, EPMS, SCADA, PLCs, or HMIs would be an advantage.
- Knowledge of SAN technologies, backup solutions, infrastructure cabling, Azure/cloud infrastructure, or relevant Microsoft/VMware certifications would be beneficial.
- Strong communication, problem-solving, and collaboration skills, with Italian and English language ability at B2/C1 level.
Cosa offriamo / What we Offer
- Fascia Retributiva (RAL): 45.000 € - 57.000 € + premio di risultato.
- Contratto CCNL Commercio (Terziario, Distribuzione e Servizi).
- Buoni pasto e piano welfare aziendale.
- Assistenza sanitaria e accesso al fondo pensione complementare, secondo quanto previsto dal CCNL
- Contribuirai allo sviluppo e alla gestione di infrastrutture digitali mission-critical, operando in alcuni degli ambienti data centre più avanzati d'Europa.
- Cresci con STACK, acquisendo esperienza su progetti di grande scala e cogliendo concrete opportunità di crescita professionale all'interno di una piattaforma europea in forte espansione.
La fascia retributiva indicata rappresenta il range previsto per il ruolo. La retribuzione sarà determinata in modo equo e trasparente all'interno di tale fascia, sulla base dell'esperienza professionale, delle competenze e delle qualifiche del candidato.
Location requirement:
Due to the hybrid nature of this role, candidates should be based close to Milan or have confirmed plans to relocate to the area. Please note that we cannot consider applicants based outside Italy for this opportunity.
About STACK Infrastructure
STACK is a proven, trusted partner for the world’s most innovative companies, designing, developing, and operating sustainable global digital infrastructure. Backed by an unmatched record of reliable delivery and development expertise, STACK brings speed, scale, certainty, and responsibility to the demands of a rapidly evolving digital infrastructure landscape.
For more information about STACK, please visit: www.stackinfra.com
Skills Required
- Experience as a Systems Engineer in an enterprise, critical infrastructure, or data centre environment.
- Strong hands-on knowledge of Windows systems administration.
- Strong hands-on knowledge of Linux systems administration.
- Experience with VMware-based virtualization and virtualised platforms.
- Troubleshooting, systems administration, and operational support experience in complex technical environments.
- Understanding of security best practices, patching, backup, and system resilience.
- Willingness to participate in out-of-hours or emergency support to maintain service continuity.
- Based close to Milan or confirmed plans to relocate to the area; applicants must be located in Italy.
- Italian and English language ability at B2/C1 level.
- Experience with scripting or automation tools such as PowerShell or Ansible.
- Familiarity with OT systems such as BMS, EPMS, SCADA, PLCs, or HMIs.
- Knowledge of SAN technologies, backup solutions, infrastructure cabling, Azure/cloud infrastructure, or relevant Microsoft/VMware certifications.
Stack Infrastructure Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Stack Infrastructure and has not been reviewed or approved by Stack Infrastructure.
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Fair & Transparent Compensation — Pay is framed as competitive across a range of roles, with multiple examples of higher compensation in sales, technical, construction, and leadership positions. Pay is also described as “pretty good,” and compensation is presented as a positive part of the overall employment experience.
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Healthcare Strength — Healthcare is positioned as comprehensive, with medical, dental, vision, life/disability, and mental-health/EAP elements repeatedly referenced. HSA/FSA options and mentions of employer HSA contributions reinforce the view that health coverage is a meaningful part of the package.
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Retirement Support — Retirement offerings are consistently described as including a 401(k), with references to an employer match and the plan being viewed as fair or generous. This contributes to the perception of a solid total-rewards package beyond base pay.
Stack Infrastructure Insights
What We Do
STACK INFRASTRUCTURE is a leading data center company built from the ground up to address the full stack of client critical infrastructure needs, today and into the future. The company delivers a comprehensive suite of wholesale, colocation, build-to-suit, and powered shell solutions in six markets.
