Holst Workplace Effectiveness - Holst, Workplace Effectiveness Holst solutions will help you inthese challenging times … READ: How to Survive and Thrive through the COVID Crisis TEST Holst Assessments Use Holst assessments to catch, keep and develop the talent your organisation needs. flowprofiler® and McQuaig are fit for organisations of every size and sector. Learn More TRAIN The Holst Series The ... Read more.