The Mark VIe control system remains one of the most used turbine controls platforms in the industry. It’s widely deployed, highly configurable, and built to last. For power producers who rely on it every day, deep expertise matters. It was a controls system built by engineers designed properly for engineers.
Here’s the challenge: Many of the engineers who built their careers around Mark VIe are no longer in the field. OEM support has narrowed. Documentation is often incomplete or outdated. The system is so well designed, it’s a black box. And when something goes wrong, delays cost money.
We built SISO to fill that gap.
We’ve Lived This System
Our team spent years in the field working directly on GE turbines. We installed, tuned, and troubleshot Mark VIe control systems in real-world conditions, not labs. We’ve seen the problems that show up during startup. We understand that trip logs don’t always reflect what operators experience in real-time.
This isn’t theory. It’s hands-on experience. Our work spans Frame and Aero units in both simple and combined cycle applications. Our project expertise ranges from commissioning on greenfield and brownfield sites to working with OEM logic and aftermarket modifications.
“The MarkVIe offers capabilities which surpass most other controls systems. Built by engineers for engineers, the MarkVIe provides the robust technical functionality required to manage critical assets, whereas these capabilities rarely exist in customer-oriented systems. SnapShot provides real time data across an entire facility which gives operators unified control, streamlined operations and enhanced performance for the whole plant.” – Max Erwin, CEO and Co-Founder of SISO Engineering
The Control System Is Just One Piece
Most turbine issues don’t live neatly in a single box. A control fault could trace back to a sensor drift. A logic bug might actually be a fuel system problem. That’s why we approach Mark VIe as one part of a larger operating environment. HMI, I/O, comms, regulators, software, hardware, transmitters and everything in between.
We support third party interface protocols. We know how to work around partial documentation. We help plants source critical spares fast, even when OEM timelines don’t cut it.
We focus on more than short-term fixes. Our work leaves your system stronger, more transparent, and easier to operate. We thrive in areas of unknowns.
SnapShot Turns Tribal Knowledge into System Insight
We designed SnapShot to build on what we already knew. It captures live data straight from your Mark VIe and turns it into something usable. Trend lines, regression analysis, alert patterns, startup profiles, all backed by human interpretation.
What makes it effective isn’t just the data. It’s how we read it. We look for early indicators that lead to failures: a regulator behaving differently, a startup drifting out of bounds, a pattern shift that indicates a deeper issue. We help our customers understand what MarkVIe is telling them in order to help them operate their plant more efficiently.
The Experts Are Leaving. We’re Still Here.
A lot of field knowledge is walking out the door. If you’re running a Mark VIe system, you’ve probably felt that already. Less support. Slower answers.
You don’t need to rebuild that expertise in-house. You just need the right partner.
SISO still knows this system inside and out. We’ve proven it site after site. And we’re not going anywhere.
Need help with your Mark VIe?
We’ll meet you where you are. Whether you’re chasing a trip, planning a control system upgrade, or just trying to understand your own alarm history. Reach us at outreach@siso-eng.com.
