Wärtsilä is an innovativetechnology company known forbeing a forerunner in the Marine and Energy markets. Every day we Wärtsilians - put our hearts and minds into turning Wärtsiläs purpose of enabling sustainable societies through innovation in technology and services into ultimate aim isto provide increased value to bothour customers and society. New game-changing ideas and continuous improvement have been part of our DNA since 1834. Together we can create new business opportunities and more sustainable future that we can all be proud of.

We want to transition the world towards a decarbonisedand sustainable pushing the boundaries of engineering and technology we can make it work. We are always on the lookout for future-oriented talent want to join the ride

OT Infrastructure Engineer (Junior-Mid Level)

Location: Herndon VA (inperson)

Wärtsilä Energy Storage Business is looking for an OT Infrastructure Engineer to join our growing DevOps & Infrastructure Team in our software development center in Herndon VA. This role is well suited for a juniortomidlevel engineer who is interested in building handson experience supporting industrial networks servers and secure communications used in power plant Industrial Control System (ICS) environments (nonnuclear).

You will work alongside senior engineers and product teams to help deploy operate and improve OT and IT infrastructure at both the computing edge and in the cloudcontributing directly to systems that enable reliable renewable energy worldwide.

Key Responsibilities

• Support the deployment configuration and maintenance of OT and IT infrastructure used in industrial control system environments.
• Assist with network and security projects including firewall configuration network segmentation and system hardening under guidance from senior engineers.
• Contribute and operate OT workstations servers virtualized environments and supporting infrastructure.
• Participate in security and architecture reviews for OT/ICS systems learning and applying standards such as IEC62443 and SOC 2.
• Monitor systems and assist in troubleshooting network server and security issues escalating complex problems as needed.
• Contribute to incident investigations and postincident reviews to help identify root causes and corrective actions.
• Create and maintain technical documentation runbooks and configuration records.
• Participate in internal knowledge sharing training sessions and operational drills.

Qualifications

• Handson experience with Linux and/or Windows systems including basic system administration tasks.
• Familiarity with virtualization platforms such as VMware Proxmox or HyperV.
• Foundational understanding of networking concepts (TCP/IP VLANs routing firewalls).
• Exposure to enterprise or industrial networking and security technologies (e.g. Fortinet Cisco Juniper or opensource tools).
• Basic scripting or automation experience (Bash Python or similar) is a plus.
• Ability to follow documented procedures learn new technologies and ask good technical questions.
• Clear written and verbal communication skills.

Preferred Experience (Nice to Have)

• Experience working in or supporting industrial OT or ICS environments.
• Exposure to the energy utilities or industrial automation sectors.
• Familiarity with security monitoring logging or SIEM/IDS tools.

• Awareness of cybersecurity standards such as IEC62443 SOC 2 or NIST.
• Familiarity with Infrastructure as Code concepts and languages such as Ansible or Terraform

Additional Information

• This is an on-site position in Herndon VA.
• This role operates in a fastpaced collaborative environment with changing technical requirements.
• You will work closely with team members across multiple time zones including the US Europe and Australia.
• Regular participation in daily team standup meetings (10:30 AM US Eastern) is required.
• Occasional travel may be needed for team meetings or training events.
• Strong English communication skills are required (B2 minimum).

We Offer You

• Competitive salary with a clear growth path toward senior engineering roles.
• A supportive technologyfocused team environment with strong mentorship opportunities.
• Handson exposure to realworld OT cloud and cybersecurity systems used in global energy infrastructure.
• The opportunity to contribute to solutions that advance renewable energy grid stability and sustainability.

Last application date: 06/05/2026

At Wärtsilä we value respect and embrace all our differences and are committed to diversity inclusion and equal employment opportunities; everyone can be their true self and succeed based on their job-relevant merits and abilities.

Please note that according to Wärtsilä policy voluntary consent for a security check may be required from candidates being considered for this position depending on the applicable country.

This is Wärtsilä

Wärtsilä is a global leader in innovative technologies and lifecycle solutions for the marine and energy markets. Our team of 18300 professionals in more than 230 locations in 77 countries shape the decarbonisation transformation of our industries across the globe. Read more on .