• Australia
  • New Zealand
  • Singapore
  • Asia


The art of movement




  • 4D multi-adjustment arms
  • Synchronised tension adjustment
  • Adjustable lumbar
  • Back lock in three positions
  • Plastic or aluminium base
  • Optional coat hanger
  • Optional fully adjustable headrest

Lead Time Guide: 14-16 Weeks

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i-Workchair goes beyond the concept of free movement.. This chair has the ability to replicate a myriad of micro movements with ease and comfort, bringing a new generation of synchronised tilt action that replicate the body’s natural pivot points. This provides a seamless transaction between upright and reclined postures.

We don’t sit still as we work. We reach, tilt and lean and i-Workchair has been ergonomically designed to support these movements. In addition the back has the ability to flex and move even when in a locked position, as well as supporting a level of sideways and rotational actions that facilitates good spinal health as we sit and work.

i-Workchair utilises a multi layered approach combining a technical fabric that sandwiches a 3D perforated foam core. This optimises user comfort whilst allowing excess heat to vent away from the back muscles, discouraging fatigue.

The arms of the seat can be the key to supporting the entire upper body, but given the diversity in users, most chair arms fail to respond well and often become obstructions. In designing i-Workchair the concept of 4D arms that are truly multi adjustable has been integrated throughout the process with the alternative option of a multi-functional arm. Adjustments are able to cater for individual requirements but beyond this, support a diverse range of working styles and tasks.

“Movement, comfort and personalisation are just some of the principles behind the design of i-Workchair, creating a chair with enhanced functionality that allows the individual to make all adjustments within fingertip reach.” Justus Kolberg.

The elegantly sculptured back frame cast in a single aluminium piece and finished in black, flint grey or polished aluminium; acts as a center piece whilst elegantly connecting all components, allowing the user to flex and rotate with ease. i-Workchair provides a dual density seat for added comfort finished with a multi layered breathable mesh inner and outer back including.

As with all furniture from Senator, i-Workchair has been designed and built with sustainability in mind, with at least 99% recyclable parts, with many being 100%


Justus Kolberg

Justus Kolberg has quickly established himself as a well-known designer. His remarkable career is the result of his intelligent designs, which he incorporates into modern technical architecture.

Kolberg earned his industrial design degree from Muthesius School in Kiel, Germany in 1990 and held positions in Spain and Germany before striking out on his own.

He has run his own studio in Hamburg since 1997, and has become a successful freelance designer working with a multitude of international companies. He has received many awards such as, 1st prize Design Champion ; 1st prize Design-Week-Award Great Britain ; IDEA-Gold Industrial Design Excellence Award ; and red dot nine times.