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"Aaron Wallis done a great job in finding the right calibre of candidate for this role. I will be in touch with you when I need my next position filling. I don't think it will be too long."

Ben Dews

Tests for Selection and Training

Aaron Wallis offers the TST, or Tests for Selection and Training, which is probably the most valid aptitude, or ability test, available in the UK commercial marketplace.  TST is used in both recruitment selection and management development and is a tool that assesses 'raw brain processing horsepower' in essence how quickly an individual processes, retains and deploys information.  TST is an excellent indicator of fluid intelligence and fast track potential.  

TST originates from Government psychometrics devised in 1980s' and has been used by the British Army Recruitment Battery (or BARB) since 1992 as a measure of fluid intelligence.  TST is a highly validated psychometric that is an extremely robust indicator of performance and an individual's ability to learn and to take onboard training.

TST tests in five areas: Perceptual Speed, Working Memory, Numerical Speed and Accuracy, Reasoning and Special Visualization, and then benchmarks each test against the UK working population.  The resulting report compares the result of each test against the UK working population together with an overall percentile ranking.  The test is taken in a classroom environment and has to overseen by a qualified Administrator.  TST Testing really does demonstrate if an individual has the right mental attributes to succeed and has proven to significantly increase the chances of making the right recruiting decisions.

How Can TST be Used in a Recruitment Process

TST  provides a reliable, accurate and valid means of identifying how quickly a person can learn and retain new skills and procedures.  It measures their trainability and speed of learning and can provide answers to questions such as:

  • Can this person think on their feet?

  • Can they cope with the mental demands of the job?

  • Can they make accurate decisions?

  • Is this person a problem solver?

  • Is this person a star of the future?

Thomas International TST (Tests for Skills and Training) typically takes around 1hr 15 mins to complete (with instruction - the testing is actually only 15 minutes in total) and requires strict controlling measures which have to be overseen by a qualified facilitator.  The results are then scored manually and fed into software that generates the reports.

Who Should We Test With TST?

TST is a general ability test that is valid in any recruitment process to both benchmark candidates and to understand the limitations of your new employees and understand their natural aptitudes.  TST is a fair and reliable indicator of aptitude across all levels and is designed to be undertaken by anyone with a reading and mathematical age of around thirteen.  In order to undertake the TST candidates must:

  • Know the alphabet and the order of its letters

  • Understand the difference between upper case and lower case letters

  • Compare simple adjectives like 'smaller' and 'taller'

  • Count up to 30

  • Subtract two numbers that are not greater than 30 and,

  • Recognise a shape and the mirror image of that shape.

What Does A TST Report Look Like?

An example TST report can be downloaded here.  Whilst the report contains some great indicators of performance and management suggestions our service also includes a full overview of the report on each candidate by a qualified Thomas International TST administrator.

How Valid Are TST Tests?

TST is probably the most validated and reliable psychometric ability test available in the UK commercial marketplace.  It is used by the British Army Recruitment Battery (BARB) and the Navy Personnel Series (NPS) as part of their recruitment selection process.  A commentary on the history of TST together with validation data can be downloaded here.


  • TST measures fluid intelligence rather than IQ using a battery of five tests.

  • TST provides a reliable, accurate and valid means of identifying potential

  • TST is fair, objective and discriminates positively

  • TST has a low-level entry point and is applicable at all levels across an organisation

  • TST is undertaken in a controlled, classroom environment so the potential for false results are minimised.

TST Costs

Aaron Wallis clients that are currently recruiting in partnership with Aaron Wallis are able to upgrade their psychometrics to the TST at the cost price to Aaron Wallis.  This will be detailed upon request.

As TST has to be taken in a classroom environment the costs vary depending on your location, your existing facilities (i.e. do you have a large enough room in which to undertake TST) and how many delegates you are looking to test.  As an illustration for five candidates to be tested the cost will be £1,000+VAT.

To all other employers, Aaron Wallis are able to offer PPA's at the following costs:

Our service includes:

  • Thorough briefing session with each applicant by a BPS Level A and Thomas International accredited consultant prior to attending the session

  • Formal invitation

  • Full administration of the testing in a controlled classroom environment

  • Feedback to both client and candidate from a Thomas International accredited consultant

  • Full report on each applicant as per the TST example here

Due to the large upfront costs involved payment is required in full (by BACS, credit card, IBAN or similar bank transfer) prior to setting up the TST Testing.  Typically we will require one week's notice and we are happy to undertake the testing outside of normal 'office hours'

Please call us to discuss your vacancy

Milton Keynes



Our employers say...

I just wanted to thank you for your help with our recruitment process which went very smoothly and has – we hope – found us just the person for the job!

Managing Director, Citrefine International Ltd

We appointed Aaron Wallis in February and the successful candidate, out of the six which Aaron Wallis introduced, was able to join Alphametrics before the end of April. The whole process took less than three months. I would recommend Aaron Wallis' services to others without hesitation.

Chief Financial Officer, Alphametrics

Rob’s knowledge of the recruitment industry and his thoughts and how to make it better for his clients have always been eye opening. I would recommend Rob to anybody who is looking for a professional, knowledgeable and flexible recruitment specialist.

CEO, Friday Ad Online Services

Since joining DSGi, Rob has been a supplier of permanent staff and has performed to an extremely high standard, successfully filling 98% of roles he has worked on. If anyone is looking for a good sales and marketing based consultancy with an informal yet professional approach, I would recommend Rob.

Senior Recruitment Consultant, DSG International

I found Aaron Wallis to be very professional and efficient, taking time to understand the role and the type of candidate we were looking for. The candidates they put forward met our criteria and were of a high standard. The service they provided was exemplary and I would have no hesitation in recommending them, and will certainly consider using them again in the future.

HR Assistant, Fischer Connectors Ltd

I really liked the YouTube presentations which made the service seem both simple and accessible. The company came to see me, and my management team, at short notice to present their service and I liked the support and advice that I received about maximising the results from the applicant.

Managing Director, Leisuresec plc

Understood the type of person we were looking for and good follow ups - not too frequent.

Managing Director, bigHead Bonding Fasteners Ltd

Rob is a true recruitment professional that goes the extra mile that I have never experienced from any other recruitment agency before. If you need sales people call Rob or someone in his team, as they really are experts in sales recruitment.

Sales Director, Inside Business

Thanks for all your help during the recruitment process. I have been extremely impressed with Aaron Wallis especially when compared to other agencies we have dealt with. I really felt you grasped the type of person we required and found strong candidates.

UK Sales Manager, Nexcom

In an industry where people over promise and under deliver, Rob and his teams have consistently provided a high-quality service. It is great to deal with someone that has an excellent understanding of UK industry, and a passion for sales.

Sales Manager, TR Fasteners

Giles is highly professional and was a pleasure to work with. He achieves excellent results through his personable skills and tenacity. I have no hesitation in recommending Giles to anyone who considers employing his services.

Commercial Director, G4S Government & Outsourcing Solutions

We were impressed not only by the quality of candidates you found for us but also the level of information, preparation and qualification you put into the process. You continually kept us informed of each person’s feelings about the process, which is very important but often overlooked. I am looking forward to working with your company again in the future.

Commercial Director, Incentive Facilities Management

Aaron Wallis has continuously provided us with suitable candidates that have been proactively sourced. Having used countless recruitment companies, Aaron Wallis are the only company that I can count on to deliver.

Managing Director, JARK Healthcare Recruitment

Giles Phillips is a rare find in the minefield of sales recruitment; an honest and thoughtful recruiter who considers the needs of both the client AND the candidate to create perfect role matches. I look forward to working with him again in the future.

Marketing Director, City of London Police

I have always found Rob to be very knowledgeable about our industry sector, and it is refreshing to see after all of these years that Rob continues to quickly and accurately understand my requirements.

HR and General Manager, THK

I have used Aaron Wallis to fill a number of our Sales Development Manager roles and I have found them to provide a very professional service. I will use their services again in future recruitment campaigns.

HR Business Partner, Greene King

Our candidates say...

I've had a really good experience working with Giles Phillips at Aaron Wallis. From initial contact to the finer details of securing the job, he has been very professional and a pleasure to work with.

M. Shutt, Candidate

Aaron Wallis helped me secure a position I really wanted. Giles sought to keep me updated with all the details preceding interviews and after with feedback. I would highly recommend Giles and Aaron Wallis Sales Recruitment.

L. Taylor, Candidate

Aaron Wallis (and in particular Rob Scott) have been fantastic throughout the recruitment process, and even a few months down the line, still continues to care. Rob clearly cares about each individual and has a wealth of knowledge and expertise, which shows in the work he does. Each candidate is not just a number, and the support received from Aaron Wallis has helped me get a career which I truly enjoy.

M. White, Candidate 

Really excellent experience dealing with Aaron Wallis. Liam Oakes who helped me get a great job was brilliant. Kept me up to date during the process and offered great help and advice, and a thoroughly nice guy. Highly recommended!

J. Hathaway, Candidate

The service provided by Aaron Wallis has been just great. I was constantly informed about what was going on with the process interview and the agent has always been supportive and kind to me.

L. Colagrossi, Candidate

Fantastic service, helped me find my ideal job quickly and smoothly. Would highly recommend them.

C. Caine, Candidate

Perfect from start to finish. Simon deserves a shout out. Best recruiter there is. If you need a job, this guy will get you one. He's like the super man of recruiters. Top man, can't recommend him enough.

M. Crisp, Candidate

Less than two weeks after joining Aaron Wallis I was offered my new job. I got a £10,000 rise in my basic salary, car allowance, a laptop and many other perks, which will help to further my career. I definitely would not have found my dream job without the help of Aaron Wallis.

C. Hoy, Candidate

Very good advice and support was given during the course of the interviewing process. Potential job seekers would be well advised to use this company whilst looking for their new career.

R. Speakman, Candidate

I have to say coming across and having dealings with Aaron Wallis proved to be very successful. Being highly experienced did not seem to count for much during my job search bit a conversation with Robert Scott gave me a real confidence boost and enabled to get a position at the age of 63. Great service!!!

D. Burgess, Candidate

Aaron Wallis is an outstanding recruitment agency specialising in high calibre sales positions. I was working directly with Darren Dewrance who went above and beyond my expectations in sourcing me my perfect role. I was kept in regular communication with Darren and he worked extremely hard to secure my dream job. Highly recommended and Thanks Darren for all your expertise and hard work.

R. Sealy, Candidate

Excellent service, very professional and friendly, would and have, recommended Aaron Wallis.

E. Heley, Candidate

I can honestly say that the time and expertise you gave me was way beyond any other recruitment consultant I dealt with. You are a rarity in your industry.

S. Akers, Candidate

Excellent experience from first contact to ultimately securing a suitable placement. Giles looked after me in a very professional and friendly manner. He used his expertise and experience to ensure I was put forward for the most suitable positions for my skill set and found me a new role very quickly. I can't recommend Aaron Wallis Sales Recruitment highly enough.

M. Green, Candidate

Aaron Wallis Sales Recruitment are a very friendly and professional recruitment organisation who listen to your needs, work with you and act on your behalf which sets them apart from many of their competitors who in my experience are willing to throw anything at you. We discussed my history, my preferences and my wishes - one opportunity was introduced. It was perfect. I start at the end of June.

R. Buckley, Candidate

Fantastic customer service, communication was brilliant, happy polite people to talk to, made everything a lot easier and smoother. Thank you for all your help getting me back in the work force, Keep up the good work :-)

K. Everitt, Candidate

Aaron Wallis have provided me with an excellent service, Giles went out of his way to help me preparing for my interview and supported me through all the processes. If you need an agency to give you a fully professional and consultative approach to finding you a new career move, the Aaron Wallis can certainly provide this for you.

D. Richards, Candidate

The Recruitment agent I used, Simon, was extremely helpful and really went the extra mile to ensure all of my questions were answered, and that I felt as comfortable and prepared as possible. Very professional company and would definitely recommend to others. Thank you Aaron Wallis!

A. Callaby, Candidate

A great recruitment company to work with. Excellent experience with Aaron Wallis through the entire recruitment process. The team was really professional and extremely helpful. Darren was a pleasure to work with. He was friendly, supportive and gave me great advice. Thank you very much!

A. Bauchet, Candidate

Good swift process with Aaron Wallis, informative regarding the role and the process was moved at a good pace with healthy interaction. Would recommend them to anyone pursuing a change.

S. Bartlett, Candidate