We our customers

Jonathan recently delivered in-person telesales training for our team at Kelsius, and we were very impressed with the overall experience. His industry knowledge and experience were particularly valuable, allowing him to bring practical, real-world insight to the training rather than relying solely on theory.

His attention to detail and the effort he put into understanding our business ensured the training was relevant and tailored to our team. The sessions were engaging and practical, with plenty of useful takeaways that could be applied immediately. We have also been very impressed with the aftercare and follow-up support since the training.

I’d have no hesitation in recommending Jonathon to any business looking to develop its sales team.

As a sales leader, I have worked with many trainers over the years, and what sets Jonathan apart is his thoroughness in getting to know our specific business before setting out the training programme.

Jonathan invested significant time learning our market, sales motion, customer conversations, and objectives before designing a tailored programme for our Inside Sales team. Rather than delivering generic telesales training, he built a curriculum aligned to the realities of our business and the challenges our team faces every day. A genuine commitment to understanding our organisation was demonstrated to ensure that the training was relevant, practical, and immediately applicable.

His approach combined engaging classroom sessions with detailed one-to-one call coaching. The call reviews were particularly impactful, focusing not just on what our team was saying, but how they were saying it. He helped improve consistency across the team, strengthen rapport-building skills, sharpen discovery conversations, improve handoffs, establish clear next steps, and create more natural customer interactions that avoided sounding scripted.

Jonathan also introduced practical frameworks for handling gatekeepers, improving call structure, and increasing the effectiveness of outbound prospecting activities. Most importantly, he reinforced the discipline and consistency required to build a scalable inside sales organisation.

His coaching style is engaging, insightful, and highly practical. Team members received actionable feedback they could immediately apply, resulting in greater confidence, improved call quality, and a more professional and effective outbound sales approach.

I would strongly recommend Jonathan and the team at GSA to any revenue leader looking to improve the performance of their SDR, BDR, Inside Sales organisation (or, frankly, any team dealing with customers). Their ability to combine sales methodology, coaching, and real-world application delivers measurable value for both individuals and the business.  A personal thanks for a thoroughly engaging and enjoyable programme!

GSA’s training and consultancy has uncovered potential that we were unable to see ourselves. The training itself was excellent and the days in the office before and after the training were exponentially beneficial.

The whole team found our training sessions with Jonathan incredibly useful. It has helped us to completely revise our approach to telemarketing and we started to see success immediately!

“I put some (training) into practice the next day and oh boy what results it brings. It gives you the desire to win that man at the other end of the phone. I had a really good conversation with a Manager ……… I identified a problem, solved it and as result was able to send him out products that same day after one call. By just sitting back and listening to him telling me his problems, he sold himself my own products. Great stuff.”

“Jonathan had been recommended to us, which is always a good indication, although not of course a guarantee that he could meet our requirements.

Upon meeting us for an initial consultation, however, it became very clear, very soon, that he understood our business, our needs and how we could best address them.

The result was a training package that incorporated all of our development requirements, delivered in an enthusing manner which spread to all of the delegates — including the more sceptical one’s!

With a strong emphasis on follow-up and continual development, our Sales Team are benefiting greatly from Jonathan’s guidance — long after he has visited. “

“The Telemarketing has improved, we are constantly going over the training you gave us which has been a great help.”

“Jonathan has run several tailored courses for DialAFlight including a Telemarketing Management Course for our General Managers and Business Development Managers as well as Telemarketing skills courses for our sales teams across the UK. The courses were focused on our needs based on discussion with both management and callers as well as some call listening and included role plays and exercises specific to our kind of prospects. The courses were fast paced and energetic and included practical telemarketing skills that our staff have used successfully in their subsequent calling. We would recommend Jonathan’s courses to anyone that needs to get better results from their outbound calling and lead generation activities.”

“This course is for everyone whether you are the most proficient telemarketer or a new telemarketer you are never too good to learn new tricks. This is one of the best ways build a stronger team – train as a team.”

“Thank you Jonathan for your input on Thursday! A highly recommended course which was well-structured, clearly laid out and interactive. Your advice had helped us to improve our methods of tele-marketing, generated more leads and built up better rapport with the customer. Excellent work!”

“Just wanted to thank you for the excellent training course ‘Making Yourself Indispensable to Your First Employer’ that you recently carried out at Hindhead Campus. The students found this extremely interesting and inspiring, and some very powerful messages were put across that will be very valuable to them as they enter the world of work. We had glowing reports about the training day, including many of the students saying they would like to work for you!!! There was a lot of content in the course, which the students acknowledged, but they said that the variation and enthusiasm you put into the day enabled them to keep focussed and on track. Thanks again for the time and effort you put into creating and organising this unique training ‘Boot-Camp’ day, and we would strongly recommend the course to other schools.”

“The SMI Group sales team enjoyed an inspirational training day with tele-marketing trainer Jonathan Silverman. The course was well planned and all the team have admitted to learning something valuable. I would certainly recommend the course to anyone who wants to grow in their knowledge of tele-marketing techniques.”

“Working with Jonathan was a great experience and he took time to really understand what we were driving at as a company. On the back of this he came up with an excellent training package which really helped to lift the performance of the telemarketing team and, whilst still early days, the results are looking encouraging”

“Jonathan’s training was fun, eye-opening and, most of all, a real motivation session. Our team can only succeed after this!”