The extant literature reveals a scarcity of research applying rational emotive behavior therapy (REBT) in business settings. Against the backdrop of severe market conditions and inevitable involuntary job loss, the application of psychological interventions to reduce mental and physical health issues is highly pertinent and potentially valuable. This paper reports the effects of an intensive REBT programme on the irrational beliefs of staff undergoing redundancy from a Blue-Chip organisation. A repeated-measures single-group intervention design was adopted so that changes in irrational beliefs could be assessed over the course of the REBT programme. Results indicated significant reductions in total irrational beliefs, other-depreciation, need for achievement, and demand for fairness from pretest to posttest phases. Social validation data indicated perceived psychological and performance benefits. Results are discussed with reference to mechanisms of change, study limitations, and applied research issues.Keywords: business, emotions, applied psychology, intervention, job loss, social validation Examining the Effects of Rational Emotive Behavior Therapy (REBT) on the Irrational Beliefs of Blue-Chip Professionals "I have been made redundant before and it is a terrible blow; redundant is a rotten word because it makes you think you are useless." -Billy Connolly Blue-chip businesses trade in a constantly changing and often unpredictable environment. The economic uncertainty that many organisations are functioning within forces sudden but necessary changes in staffing for the businesses to continue to trade. Unfortunately, as a consequence of leaner financial times, redundancies or layoffs have increased. Indeed, the Chartered Institute of Personnel and Development (CIPD) reported in 2012 that almost 2.7 million people were made redundant between 2008 and 2012 in the U.K., equivalent to one in ten employees at the start of the recession.There is little doubt that redundancy, also known as a layoff or involuntary withdrawal from work, has a negative psychological impact on the employees it affects. Indeed, research indicates that increased redundancy begets short and long term mental and physical health issues, and impaired psycho-social functioning (Beale & Nethercott, 1985;Catalano, 1991;Penkower, Bromet, & Dew, 1988;Price, Choi, & Vinokur, 2002). Job loss is associated with anxiety, aggression, apathy, passivity, and depression (Cohn, 1978;Leana & Feldman, 1988; Warr, 1978). Job insecurity, considered to be a prelude to job loss (Dekker & Schaufeli, 1995), can be augmented by planned redundancies that have not yet occurred. Work conditions characterised by uncertainty causes stress for employees (Sell, Brief, & Schuler, 1981) stemming from the anticipation of job loss and ambiguity about the future (Joelson & Wahlquist, 1987). In addition, job insecurity is associated with lower job satisfaction and increased self-reported physical stress symptoms (Heaney, Isreal, & House, 1994), and increased psychosomati...