Controls Engineer-Modular Siemens & Allen Bradley PLCs

I need a seasoned PLC developer to build a library of modular, fully-commented control programs that run flawlessly on both Siemens (TIA Portal and LOGO!) and Allen Bradley/ Rockwell (CCW) hardware. Each block should drop straight into a new project, adapt quickly to different I/O counts, and preserve three core benefits I must have: easy customization, noticeably improved functionality, and measurable efficiency gains.

Here is the scope in more detail:

• Write, test, and document reusable ladder or structured-text routines for common control-panel tasks—motor starts, VFD control, alarm handling, PID loops, network comms, HMI tag mapping, etc.
• Validate code against wiring schematics, P&IDs, sequence charts, and any functional-design specs I supply.
• Where helpful, incorporate best-practice add-on instructions, faceplates, or UDTs so future projects can be configured rather than rewritten.
• Provide clear versioned files and a brief implementation guide so my in-house team can extend the templates without your intervention.

Preferred but not mandatory: familiarity with Omron, Unitronics, Mitsubishi, IMO PLCs and VFD brands like Schneider, Bosch, or Siemens, as some projects may branch out later.

Acceptance will be based on a live software simulation or short onsite FAT showing that a sample panel can be commissioned with minimal parameter changes.