Welcome to JSL Marketing! We’re glad you’re here.



JSL Marketing is a creative marketing agency based in Dallas, Texas, with offices in Grapevine, TX, Grand Rapids, MI, and Grand Haven, MI. Our team is passionate about serving clients in their local markets, and we are dedicated to building better brands online by harnessing the power of each brand’s individual and unique “why.”

Our marketing agency offers a wide variety of services including website design, SEO strategy, content marketing and email marketing, and we are passionate about helping all businesses succeed and grow online.

Everything about JSL – from our company culture to the way we work with our clients – is based on our 5 core values.


The 5 Core Values of JSL.

Integrity – We are committed to bringing you the best possible results and strive to do everything with complete integrity and honesty. That’s one of the reasons why we love to work so closely with our clients during every step of our process.

Creativity – Marketing is all about creativity, and we are passionate about finding new ways to bring extra creative flair to all of our projects. We are committed to doing everything with excellence and we won’t stop until your project is perfect.

Clarity – Communication is so huge when it comes to marketing, whether that be our communication with you – our client – or the way in which your brand communicates with your target audience. We aim to bring clarity to all aspects of the communication funnel.

Authenticity – When you work with JSL, you can rest assured that every step of the process will be met with the utmost authenticity. We’re true to our brand and our values, and we’re also committed to bringing that same authenticity to your own brand.

Positivity – A positive attitude can go a long way, and we think it’s one of the most important aspects of any working business relationship. Positivity is often a catalyst for creativity, and we are dedicated to maintaining a positive, happy working environment.

Want to learn more about our 3 step process and marketing services? Great! Just click on the links below to be taken to the appropriate page – we can’t wait to start working with you soon!

JSL Marketing & Web Design Awards and Recognition Around the Web

JSL Marketing Awards

JSL Marketing and Web Design CEO James Leff



James has always been passionate about sales and marketing. His experience goes back 15 years between running his own businesses and also working for other companies in the sales arena.  His current areas of expertise are Inbound marketing, including content marketing and SEO.  His favorite is SEO, because he loves to beat the competition.  James is all about helping your business grow and succeed online (and off-line!) through the power of lead generation and amazingly effective sales and marketing techniques.

JSL Marketing and Web Design CEO James Leff
JSL Marketing and Web Design President Sarah



Sarah is passionate about creating copy that converts and brings you more traffic online – whether that be for your website, your blog, social media accounts or anywhere in between. A wordsmith at her core, she’s also got a sharp eye for design and loves to create beautiful websites that truly compliment your brand.

JSL Marketing and Web Design President Sarah
JSL Marketing Team Member Colin



Colin is our resident (and sometimes remote) SEO and social media expert. He loves traveling the world, cooking, any and all outdoor activities and of course, a good challenge! Which is why he is such a great match for JSL Marketing and finding innovative ways to make your social media work how it was always meant to! To be seen and shared!

Colin loves working in new ways, fields and with fresh programs and platforms! He is constantly continuing his training and finding new certifications to keep up with the rapidly changing environment of SEO and social media. He is highly organized, making him a meticulous project manager, guaranteeing that your needs are heard and kept on track throughout your experience with us.

Currently in Michigan, formerly Madrid, but always just an email away!

JSL Marketing Team Member Colin
JSL Marketing Team Member Tierney



Tierney is our content writer, blogger and SEO researcher. Anything to do with your analytics or trends, and you can bet she has studied them! She loves spending time with her best friend (a pup named Grim), reading and writing, both for work and for fun!

She has been adamantly writing for over 9 years, at first academic and research articles, and later novellas and creative pieces. Meaning she has experience in whatever form of writing best suits your needs and can adapt to any challenge.

Because of her passion for words, statistics and organization, she is able to make your content work both for SEO and for your clients, weaving these two facets of online writing seamlessly to ensure your site, blogs and posts are doing the very most they can for searches and the ones doing the searching!

JSL Marketing Team Member Tierney
JSL Marketing Team Member Shane


Shane is our lead designer. She is influenced by minimalist design because of its ability to express ideas and concepts so simply and often beautifully without sacrificing detail. Her love for art is not limited to graphic design but also extends to drawing, painting, website design, and even animation. She creates work for a variety of both print and digital marketing materials such as posters, brand guidelines, proposals, banners, social media content, landing pages, logos and more. Her desire to stay on top of all the newest design trends allows her to continually grow and perfect her skills for our company and clients.
JSL Marketing Team Member Shane
JSL Marketing Team Member Rhami


There are not too many development projects that Rhami can’t handle.  He is a full stack developer with many years experience with a variety of used languages such as CSS, C ++, Javascript, PHP, HTML 5, etc. to name a few.  When he’s not working hard for the JSL Marketing Team you can find him spending time with his girlfriend and friends at a local brewery.
JSL Marketing Team Member Rhami
Steve Bio Image



Steve’s background with SEO ranges from most industries imaginable.  From E-commerce, IT, Real Estate, Finance, etc., there is never too big of a project that Steve and our team can handle. When he’s not working, you can catch him doing anything outside like camping, running, and bicycling.
Steve Bio Image