OT / IT security and network engineering for production environments.
28+ years of network and security engineering — assessments, architecture, and hands-on expert services for offshore platforms, energy infrastructure, manufacturing and factory sites, and utilities including water.
otsec@ohkola:~$ cat assessments.md
Cybersecurity assessments
Scope agreed with the client — one target site, or several.
The information that determines cybersecurity
The automation system and the systems around it. The site network and its firewalls. Remote access, and what's on the other end of it. The cybersecurity of suppliers and service providers connected to the site.
Administrative & technical maturity
Where the client's own administrative and technical cybersecurity competence currently stands, so recommendations land at the right level rather than the generic one.
otsec@ohkola:~$ cat expert-services.md
Expert services
For new-build and retrofit projects in the client's production systems.
System engineering
Server and platform build across the system layers that sit alongside the automation network — Linux, Windows, and virtualised infrastructure (ESXi/VMware).
Network engineering
Enterprise and industrial network design and build — leaf/spine architectures, system-bus and field-bus topologies, switching and routing across IT and OT.
Network architecture, security zones & NGFW firewalls
Zone and conduit design, segmentation between IT and OT, and deployment of next-generation industrial firewalls at the boundary.
Commissioning, CSAT & FAT
On-site commissioning and Site/Factory Acceptance Testing of network and security infrastructure ahead of handover.
Remote access built to industry best practice
Remote access paths designed and configured the way the sector's best practice — not the vendor's default — says they should be.
otsec@ohkola:~$ whoami
About
Ohkola Industrial Security Oy is an independent OT/IT cybersecurity and industrial network engineering practice based in Mäntsälä, Finland.
28+ years of network and security engineering experience, focused on industrial control systems: the network architecture, hardware, and segmentation that keep operational technology running independently of the enterprise IT environment around it. Work spans offshore platforms, energy infrastructure, manufacturing and factory sites, and utilities including water.
Work is taken as single contracts, one engagement at a time — full attention on one client's network rather than a portfolio spread thin.
SECURITY ENGINEERING
FULL FOCUS
ON-SITE OR REMOTE
otsec@ohkola:~$ ./contact --init
Contact
A system is only as strong as its weakest link. Protection and detection have to be built correctly, supply-chain attacks have to be stoppable, and the details are what decide it — automation's cybersecurity included.