GSA Marketing has been a fantastic telesales partner for Nexus Media Group, helping us drive event awareness and registration. We provided the data, scripts, and audience insights, and their team ran with it seamlessly — communicating clearly at every stage and feeding information back so we always felt in the loop. They genuinely became an extension of our own marketing team.
Special thanks to Monica and Yukta, who went above and beyond to make sure our audience had a great experience throughout. Highly recommend GSA for anyone looking for a telesales agency that treats your event like their own.
Thank you, Bojan, for your wonderful feedback! We are delighted to hear about your positive experience with our telesales support. Monica and Yukta are thrilled to have been mentioned and love delivering great results. Truly appreciated! We hope to work with you again soon.
David Richardson2026.08.26
We asked GSA to run a research campaign into a specialist and quite technical market, with a fairly hard-to-reach audience, so it was never going to be a quick win. What stood out was the tenacity of the team — Monica kept us updated so we always knew where things stood, and Temara kept working the outreach rather than settling for the easy answers.
The outcome was a genuinely valuable set of data, along with several real opportunities we're now following up. The reporting was clear, and they were happy to cut the findings a different way or set up follow-up conversations where we wanted to dig deeper.
A pleasure to work with, and I'd happily recommend them.
Thank you so much, David. It was our pleasure working with you. I hope we can do so again in the future.
All the best
Jonathan
Stuart2026.07.15
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!
Thank you, Stuart, for your thoughtful and detailed feedback! I'm delighted to hear the programme was impactful and tailored to your team’s needs. Hearing about the immediate application and tangible results is truly gratifying. Zaid mentioned that he won a big order recently, and I'm so delighted to hear the team's positive feedback on the follow-up sessions, too!
Jo Millett2026.05.18
We used GSA for an event we had in London. They handled lead generation and telemarketing for the event. They were very thorough and touched base with us every step of the way to make sure the campaign was successful. They are professional and prompt and kept us up to date with the campaign and the milestones as we progressed closer to the event. I highly recommend if you need a telemarketing & B2B lead generation services you should reach out to GSA and talk to Jonathan and Monica
That's extremely kind, Jo. Thank you. Likewise, we enjoyed working with you, Lena and Alejandra.
Andy Bordass2026.05.07
GSA Ran a great campaign for us. In a 7 month outreach period they made over 3000 calls and 2000 linked in messages driving our market engagement, which lead to our industry being aware of who we were, which we were given as feedback at trade events as well as giving over 30 individual prospects to follow up.
That's extremely kind, Andy. We enjoyed working with you on this.
Surgery International2026.02.12
We engaged GSA to support our event delegate telemarketing campaign, and the results were excellent. Their team was professional, responsive and highly organised — they quickly understood our goals and delivered quality leads that helped boost delegate registration. Communication throughout the process was clear and efficient. We’re very pleased with the service and would happily work with them again.
That's extremely kind of you, Andy. We enjoyed working with you.
Soumeila Cisse2026.01.22
We have been working with the GSA team since 2020 and the collaboration has been excellent in every aspect so far.
Jonathan and his team are highly professional, responsive, adaptable and always available. They consistently demonstrate a strong understanding of our challenges and are able to adjust quickly and pragmatically.
GSA stands out for its solution-oriented mindset and true business partner approach. They are proactive reliable and continuously bring valuable ideas to the table.
A trusted and high-quality partnership that I highly recommend !
Thank you, Soumeila, for your wonderful feedback! We’re thrilled to hear about your positive experience and truly appreciate your recommendation. It’s a pleasure collaborating with you, and we look forward to continuing our partnership!
Christian Magistroni2025.12.11
We partnered with this agency and the experience was excellent. The team was highly professional, proactive, and attentive to our needs. They managed telemarketing effectively, ensuring clear communication and tangible results. A special mention goes to their Italian telemarketer, whose exceptional communication skills and ability to engage with our audience made a real difference. Highly recommended for anyone looking for a reliable, performance-driven partner.
That's extremely kind of you, Christian. Thank you. We hope to work with you again soon.
Peter Radcliffe2025.03.07
Having collaborated with Jonathan and his superb team for the last 13 years, I can easily say that they are consummate professionals and we look forward to working with them for many more years.
Thank you, Peter! We're truly grateful for your long-standing partnership and trust over the years. It’s always a pleasure working with you, and we’re excited about continuing our collaboration into the future.
Lloyd Ker2025.03.07
exceptional service and can rate them high enough. Reporting is also exceptional!
That's extremely kind of you, Mishani. We enjoyed working with you.
Jennifer Mainwaring2023.11.10
GSA demonstrated exceptional responsiveness to our evolving project demands and organisational needs. Julia adeptly understood our ideas and concepts and effectively captivated prospective leads with her exceptional telephone etiquette and strong communication skills.
The feedback and reporting provided by Kevin and Julia were incredibly insightful, enabling us to explore alternative avenues and make informed strategic choices.
I cannot speak highly enough of GSA for their blend of professionalism and personal touch in their engagement with our company. I wholeheartedly endorse their services.
It was a joy working with the team from GSA. The ability to conduct weekly reviews directly with the telemarketers was very assuring and allowed us to tweak our messages in a timely manner. We are very satisfied not only with the results, but the process and delivery as well.
That's very kind, Mark. We aim to provide a transparent, professional service and a high degree of communication. Many thanks again.
Tom Farmery2023.04.28
Jonathan and Kevin are incredibly knowledgable, patient and without doubt the experts in their field. They were fantastic at guiding myself and my colleague through a LinkedIn campaign and I was really pleased with the positive connections, conversations and brand awareness achieved.
“We partnered with GSA so we could quickly, professionally, and effectively reach-out to our European customers. GSA enabled us to interact with our client base at a speed with which we would never have been able to replicate using just our in-house language team. We had regular, professional updates with the project team and had through and insightful quantitative data, as well as interesting qualitative feedback. It was an enjoyable and successful collaboration.”
That's extremely kind, Clive. We very much enjoyed working with you!
Tim Butterworth2023.02.21
When the normal world stopped during the pandemic, we needed a way to grow a new business quickly, and GSA telemarketing helped us find new opportunities at a difficult time for everyone. They were very professional and became an extension to the sales team. Once this project was over, Kevin facilitated us to use their LinkedIn marketing platform to successfully grow the number of first degree contacts we can now talk to directly. Thank you GSA.
I have compared with 6 telemarketing training courses and decided on using GSA. I am really happy with the training structure, contents and the trainer - Jonathan Silverman. My team truly enjoyed the training and has already started to apply a few techniques while making prospecting phone calls. I would highly recommend Jonathan and his training course. The unique part of his course is that it is not a standard telemarketing course where you have the similar structure for every company. Jonathan spends his time listening to our needs to make sure the course is truly tailored to your company's requirements. Thank you Jonathan.
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