What 50+ colleagues say

Donatas is one of those rare people who defies a job title. Calling him a marketer doesn't come close to describing what he brings to the table. His knowledge spans far beyond marketing, but what impresses me most is his ability to build. While he may not call himself an engineer, I've seen him create incredibly sophisticated AI automations, workflows, and systems faster than I thought possible. On top of that, he's collaborative, generous with his time, and someone every cross-functional team wants to work with. Any organization would be lucky to have him.

I had the pleasure of working closely with Donatas on a complex construction AI platform, and he is one of the sharpest growth and marketing professionals I've worked with. His ability to quickly grasp deep-tech products across industries and translate them into clear, effective GTM strategies is exceptional. Donatas thinks holistically about product, market, and business, not marketing in isolation. He brings strong strategic clarity, moves fast, and consistently adds value beyond his scope. His ability to build robust, AI-driven pipelines for lead generation and awareness was one of the most impressive growth plans I've seen. Any team would benefit from having him lead growth and marketing initiatives.

I have worked with Donatas in multiple different roles. He was a the lead for growth marketing, his work was impeccable and his attention to detail has been amazing. He led a team to develop, implement and launch a whole sub-business of Phoenix, very successfully. Also he has developed several sites and launched other ventures that I have done. He is my go to for growth. I can't recommend him highly enough.

I didn't have the opportunity to work with Donatas for long, but even in a short span, his impact was unmistakable. He brought a rare combination of strategic clarity and executional precision to every conversation, distilling complex growth challenges into clear, actionable priorities. His knowledge of B2B SaaS, AI, and crypto is matched by a deep understanding of GTM strategy and data-driven marketing. Donatas doesn't just talk growth, he builds it, scales it, and optimizes it with a calm confidence that sets him apart. A real asset to any team or venture lucky enough to have him onboard.

Donatas is highly motivated, fearless, and possesses a unique set of skills paired with great passion. Working directly with him has been an honor. I've learned a lot from his approach, making it a continual pleasure to collaborate. Donatas impresses with his ability to understand and connect technical details with broader business goals. This skill makes him stand out and contributes significantly to success, effectively creating a bridge between emotions and sales, is truly inspiring. Donatas ability to innovate and drive results, while maintaining a keen sense of team dynamics and morale, sets him apart as a remarkable professional. His contribution has not only accelerated our success but has also fostered a stimulating and enjoyable working environment. I look forward to every opportunity to work with him in the future.

Donatas is extremely professional and brings a positive energy to everything he's engaged with. He's a pleasure to work with while also being a star player. His passion for self development outside of work brings professionalism and experience, and it shows in the quality of work he delivers. I would love to work with Donatas again.

I've had the pleasure of working with Donatas on numerous projects, and each experience has been nothing short of exceptional. Beyond his remarkable work ethic, Donatas exhibits exceptional leadership qualities, guiding his team with clarity, empathy, and a deep understanding of the task at hand. His ability to inspire and motivate others is truly remarkable, fostering an environment of collaboration and innovation. I have the utmost respect for his professionalism and integrity. He'd make a great addition to any team he joins.

As our Head of Growth, Donatas goes above and beyond the requirements of a project. He is more than qualified and is always delivering a 110%! Having the pleasure to work with him at Quiqup, he made a reputation for finding and implementing new ideas and initiatives for the company at a rapid pace. The value he demonstrated was clear and exceptional, always exceeding the initial expectation! Personally, Donatas has a very warm character and is quite the sociable person, making the work environment feel more like a personal gathering than a work activity. While he has a humble and light personality, he also displays a high motor, goal driven edge and unparalleled determination.

I had the pleasure of working alongside Donatas and I'm consistently impressed by his dedication and positive attitude. He is a reliable team member who always brings a proactive approach to projects. Donatas has a great ability to communicate effectively and collaborate with others, making him a pleasure to work with. He would be a valuable addition to any team.

I had the pleasure of working with Donatas for nearly 3 years at parcelLab. Donatas, or Donni as we fondly call him, has truly developed into an exceptional growth hacker, thanks to his relentless drive and passion for the industry. When Donni first joined parcelLab, he demonstrated an insatiable curiosity for all things growth. He dove headfirst into various projects and was never afraid to experiment, which allowed him to gain hands-on experience in different aspects of growth. During his time at parcelLab, I have seen Donni grow in his role as the Head of Growth. He has developed a deep understanding of growth marketing and has become an expert in using data-driven strategies to achieve desired outcomes. He consistently pushes the boundaries of what is possible and identifies new opportunities to drive growth.

I had the pleasure of working with Donatas Simkus at parcelLab, where he served as the Growth Marketing Manager and Head of Growth. Donatas is an exceptional co-worker and professional with a strong ability to motivate and inspire those around him. His deep understanding of marketing and growth areas enabled him to develop and execute effective strategies that consistently delivered results. I really enjoyed working with him, as he was positive, welcoming and took the time to invest in building relationships. He was also able to quickly identify and address any project-related issues with ease. His ambition and dedication to excellence were invaluable in helping us achieve our goals. I highly recommend Donatas and would be delighted to work with him again.

Donatas supported the global sales team in building a high quality funnel that brought a consistent flow of qualified leads for Account Executives to convert into customers. He was instrumental in the growth of our B2B offering and supporting us in hitting sales targets!

Donatas is a brilliant growth lead that excelled the inbound B2B sales pipeline. Always making sure the Marketing and Sales strategy was aligned, he guided us through his approach and used data and psychology to crack the code. A great friend and teammate too, it was a pleasure working alongside Donatas and his big personality.

Donatas is a talented and ambitious Growth Marketer and an invaluable member of any team. He has the ability to fine-tune a campaign to perfection. He is an intelligent, results driven professional who really takes ownership of any project that comes his way. His work ethic is second to none and he is an absolute pleasure to work with.

Donatas was one of the people I worked with most closely when I first joined Koinly and was a huge help in not only helping me settle and understand the business but work with to solve problems and launch new initiatives. He has an incredible work ethic and is always looking into how we can better improve and grow the business. He was key in identifying and executing key initiatives to grow our B2B vertical with a very strategic and analytical approach and was very much well thought of amongst his peers for the support and advice he provided.

Donatas was one of my first few hires at Koinly to build the B2B Growth Team. Donatas is a great manager and team player but most importantly an awesome executor. What I was particularly impressed with whilst working with Donatas, is alongside the ideation was structure and reporting. The Growth experiments were executed flawlessly and the reporting on the success/learnings of these experiments was superb. This allowed us to iterate super fast and really deliver on our objectives or course correct. He has incredible 360 knowledge on Growth and Marketing and became a resource to many on the B2B and B2C side for new initiatives. On top of all of this, he is low ego, very thoughtful and a pleasure to lead.

Even though we worked in different teams and across different timezones, Donatas was always very supportive and willing to help. He is also receptive to feedback and quick to implement changes needed.

Donatas! is inhumane. I met to him via Upwork. I have never faced such a workaholic and skilled person like him. He knows everything and his vision is crystal clear. True jem for any company. It was my honor that I worked with him in some projects. I learned a lot from this guy. Thank you mate for giving me the opportunity. Best wishes

Donatus is an impressive marketing leader and has one of the strongest work ethics I've come across. He is skilled in his role and has a level of insight into the B2B marketing tech stack that can only be learnt with the unique level of discipline and commitment to growth that he brings to his role. He was always willing to help and remains able to get hands on when needed. He is still the person I go to for any advice, tips or how to's in B2B marketing and has been a pleasure to work alongside. I will miss our interesting discussions exploring new tools and best practice after work.

I have had the pleasure to have Donatas as my manager at Koinly. He is an exceptional growth individual and B2B Growth Leader. What really stood out to me when I started working with Donatas is that he is very hard-working; his work ethic is like no other and with his passion for growth and digital marketing, the sky's the limit for him. I can wholeheartedly recommend him for any company, especially within the B2B SaaS space in a growth role.

Donatas is intelligent and deeply data-driven person. He's always the right 'fresh eye' to bring on a project, offering the most impactful perspectives and most relevant direction on growth strategies. Always a joy to work with him if you appreciate someone who will challenge you, always, to hold out and shoot for the best.

I had the pleasure to work with Donatas on a number of projects and can attest to his skills in digital marketing. He is an excellent strategist and can think outside the box to come up with creative solutions to problems. He is also a great project manager and is able to keep track of all the details to ensure that projects are completed on time and on budget. I would highly recommend Donatas to anyone looking for a talented digital marketing professional.

Donatas is a talented marketing expert who is extremely knowledgeable in growth marketing, especially for B2B tech businesses. He is always learning and expanding his knowledge of full stack marketing. His passion for problem solving is an asset to any business. Donatas is a kind, thoughtful and analytical professional who is a pleasure to work with.

Donatas has breadth and depth of martech knowledge. He was a super user of a full stack. I was very impressed by his willingness to learn and master new tools. He has a creative approach to finding solutions for everyday business challenges. Very analytical and attentive to detail. Donatas is definitely an asset to any marketing team and company. They'd be lucky to have him.

Donatas is an interesting combination of high energy, calmness, resourcefulness, reflectiveness, and very collaborative. He is highly capable, incredibly inquisitive, always on the hunt for new paths, technologies and ways of doing things, he's a pleasure to work with and you're guaranteed to learn something new.

It was a really pleasure to work with Donnie. He always try to find solution, new idea to achieve our goal! Always smart and kind! A real expert!

It was a real pleasure to work with Donatas. He was always proactive to help our french team to generate leads. In addition, Doni is always in a good mood, it's someone with whom it is very pleasant to work with.

Donatas gave me my first glimpse into the strategic world of Growth Marketing. He builds his campaigns with a deliberate strategy and clear targets. Overall a valuable member with a unique sense humor to have in every Marketing Team.

Donnie has been an absolute pleasure to work with. he is a hardworking Individual with so much knowledge in what he does. Donnie always seeks to find the answers to anything he is not so sure about and is always on hand to share and teach others. he wants to see others succeed and I am here for it. He is wonderful and always strives to make others feel welcomed.

Donny is a true expert in digital marketing & lead gen. He is always ready and willing to provide solutions to problems, with his in-depth knowledge. and not to mention his great sense of humour. His ability to handle complex data and come up with innovative ways to add value to marketing campaigns is something that is rare. A great colleague and one who is truly missed!

I worked with Donny while at parcelLab. A great team member and a pleasure to work with. We worked together to build up Donny's team, and he had great insights and feedback into candidate's application and performance.

I was lucky enough to work with Donatas directly in my role at parcelLab. The work Donatas did to help my team with multiple projects and assist our growth was fantastic. I'd highly recommend Donatas to anyone that's looking for a subject expert and was sad to see him leave!

There is no one quite like Donatas. He has wit for days and energy that lights up a room. But the greatest benefit of having Donatas in your team is his analytics skills. Donatas is thorough and dedicates a lot of time to sharing his knowledge, which I found particularly helpful when we first started working together. I will miss him, but I know he'll go far!

Donatas is a very skilled professional with great managing and leadership abilities. I was very pleased to be a part of his team since he helped me to become a more data-driven digital marketer. I especially liked that he was a manager focused on getting the most from his team by empowering them to make decisions and grow, but always leaving room for creativity and inspiration. On top of that, he was always available to help and always gave credit where credit was due.

I worked in Growth Management under Donatas's great leadership. He introduced me to the field of lead generation. Here I was able to learn a lot from him and gain a lot of experience. Donatas is a reliable, helpful colleague who always has a smile on his face. He also always has meaningful advice, so I have always enjoyed working with him.

Donnie, Donnie, Donnie. Everyone needs a Donnie. We have a Donnie today. But we may not have Donnie at some point in the future. And that would mean you might yet get a Donnie. Lucky you. This is what you'll get. He's weird. No, not that kind of weird! Weird, cool weird. Naps during the day. In the middle of the day, with everyone else still awake sitting in the same office, watching him sleep. But then you get a security alert that someone with his ID creds has entered the same office both days over the weekend and done his thing. Donnie is both ends of where most of us are. He's early and he's late. Everyone needs a guy like that.

When I onboarded Donatas at parcelLab, I introduced him to our marketing tool stack, e.g. Hubspot. I quickly realised that I was dealing with an extraordinary person. So it was no surprise it didn't take long for him to overtake me in his skills on those. Donatas always has the curiosity to explore new solutions and the will to improve the status quo, gifted with the ability to dive deep into the nitty-gritty. He has built up digital marketing at parcelLab over the past years and contributed a lot to the company's growth. Also, he has supported the whole marketing&sales team, including me at parcelLab on multiple occasions. It was a real pleasure to work with him, and I hope to do it again one day!

Donatas is a really hard-working colleague, self-motivator and too detailed. I really enjoy working with him and I personally learn from his thoughts and we always have fun together at parcelLab. I wish him a lifetime success.

Donatas is a hard working, fun and a curious person that brings a lot of value to the lead generation and marketing department of ParcelLab. He is constantly learning and improving his skills and I look forward to working with him.

A fine mix of consumer and business marketing expertise makes Donatas a valuable asset to any company. I've often enjoyed sharing and exchanging theories and experience with him, which has personally benefitted my career.

Donatas is a great team player and an essential part of an organisation. He is a fast learner and a hustler which allowed him to progress quite impressively, starting from working within the live operations team to spotting an opportunity and moving into the marketing team raising the company's bar in digital marketing. Great guy to have around.

I've had the pleasure of working with Donatas across a few projects. He's incredibly proactive in trying to find solutions to problems and is a real ideas guy. I was particularly impressed by his determination to build the best SEO strategy for Quiqup's new website during our rebrand, and the constant advice he gave the team on best practices for copywriting. He's also someone who's a real team player who won't shut down anyone else's ideas and takes everything on board with a smile. A real asset to anyone's marketing team!

I have spent almost 2 years with Donatas seeing him excelling in everything he does. His strong work ethics and skills not only benefited company in operations, but also helped the international team to succeed through his marketing practices generating huge amount of inbound leads through our website. Generally, great guy to work with, efficient, knowledgeable and will make you laugh a lot.

Donatas has always been the person to turn too when you have looked a problem from every angle, he is a forward thinker and a great problem solver. Donatas's time at Quiqup he imprinted in almost every department. I only had the pleasure of working with Donatas directly whilst he was in the customer operations department however his thirst to keep learning once he went across to the marketing department saw Donatas blossom. Taking on new challenges during re-branding and also other changes, he took this in stride with the same problem solving and can do attitude. I wish him the very best for the future he will be an asset to any company he goes too.

Donatas is a very genuine and a hardworking person, always wanting to learn more. Always exceeds expectations. He has been a great team member, a supervisor and amazing manager.

I worked with Donatas while employed by Quiqup and I can say he is a very valuable member of the Marketing Team, his commitment and passion for the job and the company is remarkable. He made a brilliant career progression, demonstrating his strengths and working hard to make sure he is giving everything to the projects he is managing. I really enjoyed working with him! All the bests to you Donatas!

Donatas is a very funny, down-to-earth & approachable individual. Having worked with him the past year and a half, I can confidently say that he is very pragmatic & scrupulous in his approach to work. He pays very close attention to detail, without being too pedantic in his tasks. His well-humored & empathetic nature compliments his high work rate, as he isn't afraid to share his enlightening experiences and words of wisdom among his colleagues & peers. All these qualities made him a great manager, and a wonderful colleague to work alongside.

It's rare you come across such a genuine and devoted professional; Donatas is very curious to always learn and push both himself and the team/business forward. This is evident in his experience at Quiqup this far, where he has been able to progress through different positions and departments, and he continues to help better the company, way past his own team. No doubt Donatas is an asset to any company.

I've met Donatas while working at Quiqup and I found him as a friendly, motivated and ambitious colleague who always tried to provide value for the company and improve his skills.

I worked with Donatas for 9 months and he was always helpful, thinking out of the box and very proactive.

I have the pleasure of working alongside Donatas in the marketing team at Quiqup. Since he joined the team, It didn't take long to realise that he is an incredibly hard working individual. He is very passionate about his work, and the growth and success of the company. He is very focused, works around the clock, and has made a very positive impact to the team.

Hard working, inquisitive and solution focused, Donatas is always looking to get more from himself and those around him.

Donatas is a gem of a person, humorous, intelligent and diligent. In the time I have known him professionally he has gone out of his way to assist my team whenever we have come across issues. He would be an asset to any team, both as an employee and as a manager.

Donatas progressed through the ranks from a customer service representative to a full shift lead during my time at Quiqup. Despite English not being his first language, he successfully developed his communication skills to compensate for this. He kept his cool under stressful situations and knew how to rally his team at the hardest of times. He also possesses strong analytical skills and is extremely comfortable multi-tasking on a busy shift.

Donatas and I have been working together for almost a year now, and he continues to impress me. He is hard working, intelligent, a team player and above all a problem solver. He is a great asset to the team!

It's rare that you come across standout talent like Donatas! I had the pleasure of working with Donatas for over a year at Quiqup, collaborating as colleagues and leaders, as well as on several projects. I was always in awe of his ability to command a room and get people on board with ideas, even people who were initially on completely different pages. As a team member or a leader, Donatas earns my highest recommendation.

Donatas is a truly passionate and forward thinking leader who drives change in terms of process and product innovation. He always challenges himself and others at the workplace and leaves no stone unturned. He is ambitious yet also possesses high self-awareness and is also highly organised when it comes to planning. Overall, Donatas can master a myriad of skills at great speed and is a real team player when it comes to achieving a set goal.

Diligent and hardworking, Donatas is always there for the team to save the day with his new bright ideas for making our logistics company's operations run smoother.