About this role
WHO WE ARE
Mariner innovates always and everywhere, turning novel ideas into practical solutions. From products and services to venture creation, we build better futures powered by people. Our purpose has always been to be a great, everlasting technology company for those who make an impact - elevating people, data, and technology in the best way to solve hard problems. We partner with people embracing change, leveraging data, cybersecurity, cloud, and change management to drive successful business outcomes that matter to our customers. Mariners build for change. Like
SHIFT
Energy, our energy management and decarbonization company. Or East Valley Ventures, created to scale social economic impact in our communities through investment and mentorship of emerging change-makers and their companies. Mariner s purpose has always been to be a great, everlasting technology company and the core values that guide us every day are: OUR VALUES We care for our team. We care about the impact we have on our community. We serve by solving complex problems. We grow because growth fuels opportunities. We innovate always and everywhere. We build a business that lasts.
OVERVIEW OF THE ROLE
- We are seeking a Senior OT Control Systems Engineer to join a critical industrial operations environment in Saint John, New Brunswick.
- In this role, you will be responsible for the design, support, optimization, and security of Operational Technology (OT) and industrial automation systems that enable safe and reliable operations.
- The successful candidate will bring extensive experience in process control, industrial networking, distributed control systems, and automation technologies within complex industrial settings such as refining, manufacturing, utilities, or other process-driven environments.
- This is an on-site position in Saint John, NB.
- WHAT YOU LL BE DOING IN
THE ROLE
- Lead the design, implementation, and enhancement of OT and industrial control system solutions to support operational and business objectives.
- Configure, maintain, and troubleshoot automation systems, including DCS, PLC, HMI, SIS, and asset monitoring platforms.
- Develop and maintain control strategies, system configurations, and automation standards to improve performance, reliability, and safety.
- Design and support industrial networks, ensuring high availability, cybersecurity compliance, and secure system integration.
- Plan and execute system upgrades, patching, lifecycle management activities, and technology modernization initiatives.
- Monitor system health, investigate operational issues, and provide advanced troubleshooting support for critical automation infrastructure.
- Lead commissioning, startup, testing, and validation activities for new and modified control systems.
- Collaborate with operations, engineering, maintenance, cybersecurity, and external vendors to deliver reliable and secure automation solutions.
- Support process safety initiatives, risk assessments, and change management activities while maintaining technical documentation and procedures.
- WHAT SKILLS / QUALIFICATIONS YOU LL NEED TO DO
THE JOB
- Required Experience 15+ years of experience supporting Operational Technology (OT), industrial automation, or process control environments, including significant experience in heavy industrial operations.
- Strong expertise with industrial control technologies, including DCS, PLC, SCADA, HMI, Safety Instrumented Systems (SIS), and industrial networking platforms.
- Hands-on experience with OT infrastructure, cybersecurity practices, network architecture, and system lifecycle management.
- Proven experience troubleshooting, maintaining, and optimizing complex automation and control environments.
- Previous experience in refining, petrochemical, energy, utilities, manufacturing, or other process-intensive industries is highly desirable.
- Technical Expertise Honeywell Experion PKS, TPS/TDC, Safety Manager, and HMI Web.
- Rockwell Automation platforms, including Studio 5000 and F