Voiceover That Makes Your Message Heard & Felt.
An authoritative, yet warm voice – trusted for commercials, corporate narration, eLearning, and medical content that connects.
Voice Over Demo’s
When your message matters, a Professional Voice makes all the difference.
Clarity in Every Word.
Scripts aren’t just read—they’re interpreted with intention, nuance, and pacing that keeps your listener engaged. I bring a trained ear and a collaborative mindset to every project, making sure your message lands exactly as it should.
Comfort with Complex Content.
From pharma explainers to technical demos, I voice intricate material with precision and warmth. With a background in clinical psychology, I help make dense and complex content clear.
Fast Turnarounds. Zero Drama.
When deadlines are tight and stakes are high, you need more than just a great voice—you need reliability. I deliver clean, ready-to-use audio fast, stay responsive throughout the process, and make sure you never have to chase a file.
Current Projects
Commercial - Callixe Social Media Ad
Corporate - IVR Phone Messaging
Audiobook - Surviving the Narcissist
Commercial & Brand Voice
Conversational & emotional reads that feel human – not hypey!
[Click to Hear the brand examples.]
Corporate & eLearning Narration
Clear & engaging delivery that simplifies training and retains attention.
[Learn more →]
Medical & Technical VoiceOver
Confident delivery for pharma, health, biotech, & beyond.
[Explore medical VO →]
Podcast & Audiobook Narration
Bringing stories to life with authenticity.
[Explore Audiobook VO →]
My experience includes work on commercials and online social media ads, corporate training and eLearning narration, medical narration, explainer videos, podcasts, audiobooks, and more!
For COMMERCIALS & ONLINE SOCIAL MEDIA ADS, my commercial reads strike the balance between conversational and credible—perfect for brands that want to connect without the hard sell. Whether it’s a 15-second pre-roll or a polished brand anthem, I bring emotional nuance and timing that fits the platform and the message.
You want to engage and educate with CORPORATE TRAINING & eLEARNING projects. With a calm, clear delivery, I make complex training scripts easy to follow—and easy to listen to. Clients trust me to bring consistency, warmth, and professionalism to projects that need to inform without overwhelming.
MEDICAL NARRATION scripts demand clarity, care, and a voice that respects the gravity of the content. I specialize in translating dense material into understandable, human-centered narration—without ever talking down to the listener.
For PODCASTS, AUDIOBOOKS, AND AUDIO-DRAMAS Storytelling lives in the space between the words—and that’s where I work best. Whether I’m voicing an audiobook, embodying a character in an audio drama, or guiding a branded podcast, I bring presence, pacing, and emotional honesty to every read.
Want Smoother Voiceover Sessions?
A few simple tweaks to your script can make a big difference in how quickly your project gets voiced—and how clearly it comes across.
Grab this free checklist to help you prep like a pro (without becoming one).
Reviews
Jennifer Hayes O'Neill
Author"Jennifer did a wonderful job narrating my book. I had been putting off making an audio version because I was overwhelmed trying to figure out all the logistics. Jennifer instantly solved all of it for me.
She is an experienced, professional, and knowledgeable narrator. All I had to do was let her know what I wanted and she figured out the rest. It made the process easy and stress free for me.
I could not be happier with the quality of her narration. For quite awhile, I intended to do my own narration. But once I heard Jennifer's sample of one of my chapters I realized that would have been a huge mistake. She captured the tone, pacing, and inflection I didn't even know I wanted.
Honestly, she understood what the narration needed far better than I did. It is like handing a manuscript to a really good editor and realizing how much better it reads after the edits.
Jennifer was easy to communicate with and responded quickly throughout the entire process. She was transparent about her process and fees from the beginning and checked in with me every step of the way to confirm what I wanted and that she was on the right track with the narration.
I can not recommend her enough! If you are looking for a wonderful narrator who is professional and easy to work with, Jennifer is the one."
Mary Elliott
Author,4me Digital Enterprises LLC"She is a natural! Jennifer was also great at communicating the progress of her recording, and even finished ahead of schedule. I had just a few very minor changes and they were addressed quickly and professionally. I definitely plan on using Jennifer again when I publish another book, and HIGHLY recommend her to anyone looking for a professional, soothing and knowledgeable voiceover artist!"
Michelle Santos
Author,Smart Learning Solutions LLC"I highly recommend Jennifer Tzoumas for anyone seeking a top-tier voice talent and a producer who goes above and beyond. I look forward to the opportunity of working with Jennifer again on future projects. Thank you, Jennifer, for your outstanding skills and commitment to excellence!"
Working with Jennifer is an absolute pleasure. She’s not only incredibly talented and versatile—able to switch tones and styles on a dime—but she also takes direction really well! Whether it’s a playful read, something heartfelt, or a high-energy, she nails it every time. On top of all that, she’s genuinely cool, easygoing, and fun to collaborate with.
Michael Hoang
Callixe
You are the perfect avatar for us. Your natural speech sounds very commercial, which is great for our VSL ads.
Michael Hoang
Callixe
Jennifer has been such a pleasure to work with! She's incredibly fast and puts so much thought into each scene, even making sure the revisions are done correctly. Her speech is so natural and easy to listen to, which really elevates the content. On top of that, she's very organized - every clip is clearly named and labeled, making the process smooth and hassle-free. I highly recommend her for anyone looking for a natural and reliable UGC creator!
Kimberly Conway
YellaBird
Jennifer was great to work with. She was prompt, communicative and delivered ahead of schedule. Final files were spot-on and required no revisions. Would gladly work with her again.
Susan Njuguna
Author"Jennifer did an excellent job in the production of my audible book “Understanding the Inner Being.” Her voice over skills for audiobook narration was excellent, She had a warm and smooth and easy to listen voice delivery style that presented as friendly, confident, and is very knowledgeable."
Jennifer was AMAZING to work with. We actually had her on camera for this voiceover, which is rare. We had a great time on set and it was very comfortable and easy. Would recommend Jen to anyone!
Pete Violand
AuthorThank you so much for your very professional job on the voiceover of my short story "El Milagro." It was a pleasure doing business with you. This was a somewhat tricky piece because you had to incorporate a lot of Spanish into it. But you did a speedy study and got the accent down perfectly. Your voice was smooth and steady throughout the entire reading. You were always available for consultation; when corrections are needed, you never hesitate to make them immediately. I will use your unique talents in the future for other projects. Lastly, your pricing is very reasonable.
Mary Elliott
Owner,4me Digital Enterprises LLC"I picked Jennifer over many other auditions because of the quality of her voice and her skills in bringing my book manuscript to life. I was amazed at her confident but easy-going tone, and she nailed the inflection points every single time. She seemed to intrinsically know what to emphasize in the text, and what to treat more subtlety."
Michelle Santos
Author,Smart Learning Solutions LLC"I had the pleasure of working with Jennifer Tzoumas as the producer for my project, “Jumpstart Your Machine Learning Journey,” and I couldn’t be happier with the results. Jennifer’s voice-over skills for audiobook narration are truly exceptional. Her delivery style, characterized by warmth, friendliness, confidence, and knowledge, added a remarkable dimension to the content. Throughout the production process, Jennifer demonstrated a high level of professionalism and dedication. Her commitment to service excellence was evident in every aspect, from the quality of her work to her effective communication. Jennifer ensured that the collaboration was not only smooth but also enjoyable."
Lenny B
Voice Over Audio Engineer"Jennifer projects confidence, leadership, and quality. If you need a voice that has these qualities for your project, she will deliver that for you! It comes naturally to her. Additionally, if you are looking for a "voice" well-versed in all things personal growth, she's a perfect fit!"
Behind the Mic
I’m Jennifer, a trained voice actor with a background in psychology and a studio powered by herbal tea, precision, and a mini goldendoodle curled at my feet. My clients don’t just get great audio—they get peace of mind.
Clients consistently say I bring more than just a voice – They appreciate my ability to:
- Bring the script to life with instinctive pacing, tone, and emotional nuance
- Deliver fast, clear, and organized files — often ahead of schedule
- Collaborate creatively, putting thought into every scene and revision
- Adapt to complex requests
- Offer a natural, confident voice that elevates everything from VSLs to audiobooks
I’m also a licensed clinical psychologist with 25 years in private practice, which gives me unique insight into medical and psychological content — and a deep understanding of how to make listeners feel seen, heard, and understood.
I’m passionate about faith, family, and creating authentic connections — with clients and audiences alike. If you’re looking for a professional who can elevate your message and make your job easier, I’d love to collaborate.
Contact Me
Lets talk about YOUR next project!
I’d be happy to send you a
complimentary sample
of your script with my voice.
Contact Me
I do NOT license my voice to any AI/synthetic models or voice clones and warrant all work done with me to be performed by me.
