Sr. Infrastructure Engineer

Mainstay Maritime; Duluth (MN); On-site; USD 110,000 - 160,000; Full time

Job summary

Mainstay Maritime in Duluth, MN, seeks a Sr. Infrastructure Engineer to lead the design, deployment, and optimization of IT infrastructure across vessels and offices. You will build and support complex network solutions that ensure reliability and security for critical operations.

You will implement automation, manage vulnerability programs, monitor threats, and collaborate with the business systems team to provide access to essential applications while supporting travel requirements.

Qualifications

• Bachelor’s degree in computer science or a related field is preferred.
• 7+ years of experience in multiple core infrastructure technologies is preferred.
• Recognized Networking Certification (e.g., CCNA, Fortinet NSE, Palo Alto NSE) or equivalent experience.
• A combination of education and experience is acceptable.

Responsibilities

• Build, configure, and deploy complex network and infrastructure solutions that support vital business operations.
• Administer, maintain, and support core infrastructure to ensure reliability, scalability, and security. Implement network security policies and controls that monitor for threats, perform other security-related tasks that enhance data security.
• Maintain policy and process for infrastructure vulnerability management, penetration testing, and compliance.
• Leverage automated workflows for infrastructure provisioning, deployment, and centralized management to promote efficiency, scalability, and cybersecurity.
• Investigate and resolve complex technical issues to minimize operational downtime and protect against data loss.
• Collaborate with business systems team to ensure vessel and office access to critical business applications and to maintain related onboard workstations.

Skills

Networking

Security

Infrastructure

Automation

Troubleshooting

Collaboration

Education

Bachelor’s degree in computer science or related field

7+ years of experience in core infrastructure technologies

Networking Certification (e.g., CCNA, Fortinet NSE, Palo Alto NSE)

Tools

Terraform

Ansible

Python

Virtualization

Job description

Description

One Fleet. One Future.

Build your career on the Great Lakes with Mainstay Maritime. Through our diverse operations and dedicated team of professionals, we deliver comprehensive supply chain solutions across the Great Lakes.

We take pride in our world‑class safety record, maritime and technical expertise, and the efficiency and flexibility of our operations. Whether on the shoreside or aboard one of our vessels, you’ll be part of a team committed to excellence, safety, and keeping commerce moving across the Great Lakes.

We are currently seeking a Sr. Infrastructure Engineer to join our team. They will Provides senior‑level technical expertise that is needed to implement, maintain and optimize core IT infrastructure for all vessels and offices. Ability to troubleshoot complex issues, and ensure the reliability, security, and scalability of business‑critical IT infrastructure.

• Build, configure, and deploy complex network and infrastructure solutions that support vital business operations.
• Administer, maintain, and support core infrastructure to ensure reliability, scalability, and security. Implement network security policies and controls that monitor for threats, perform other security‑related tasks that enhance data security.
• Maintain policy and process for infrastructure vulnerability management, penetration
• testing, and compliance.
• Leverage automated workflows for infrastructure provisioning, deployment, and centralized management to promote efficiency, scalability, and cybersecurity.
• Investigate and resolve complex technical issues to minimize operational downtime and protect against data loss.
• Collaborate with business systems team to ensure vessel and office access to critical business applications and to maintain related onboard workstations.

Requirements

Preferred Education / Experience:

• Bachelor’s degree in computer science or a related field,
• 7+ years of experience in multiple core infrastructure technologies,
• Recognized Networking Certification (e.g., CCNA, Fortinet NSE, Palo Alto NSE), or
• A combination of education and experience equivalent to the above

Preferred Knowledge / Ability:

• Advanced networking, enterprise storage, hyper‑converged systems, virtualization, satellite communications & connectivity.
• Proven experience with IAC and automation tools (e.g., Terraform, Ansible, Python).
• Exceptional analytical and problem‑solving skills to tackle complex technical challenges.
• Strong communication and collaboration skills, capable of articulating complex technical concepts to both technical peers and non‑technical stakeholders.
• Ability to identify, define, and solve problems, set priorities, and implement solutions effectively with minimal direction or guidance.
• Ability to multitask and work well under pressure within deadlines; excellent organizational skills.
• Must be able to obtain and maintain a Transportation Worker Identification Credential (TWIC) to access secure areas of vessels.
• Some travel required.