Meet the Team

The #1 Real Estate Team in Boulder and Boulder County

Welcome to The Zach Zeldner Team, where market expertise meets unwavering dedication. With over 50 years of combined experience and more than $1.5 billion in total sales since 2019, our team has redefined excellence in Boulder County real estate.

Led by Zach Zeldner, a Compass Founding Agent and the #1 individual agent in Boulder County, our team blends deep market knowledge, strategic deal-making, and a client-first approach to consistently deliver exceptional results. Whether you're buying, selling, or investing, we provide seamless, high-touch service tailored to your unique real estate goals.

The Overall Market:

76

Transactions

$143.03M

Sales Volume

4.75%

Market Share in Boulder

$1.88M

Average Sales Price

The Luxury Market ($2.5M+):

20

Transactions

$71.9M

Sales Volume

8.98%

Market Share in City of Boulder
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A Team Defined by Excellence

The Zach Zeldner Team is built on a foundation of expertise, collaboration, and a commitment to delivering exceptional real estate experiences. Our professionals bring diverse strengths—from strategic negotiation and investment expertise to seamless transaction management and innovative marketing.

Every client benefits from our comprehensive, team-driven approach, ensuring that every detail is expertly handled. From luxury estates to first-time home purchases, we tailor our strategy to achieve optimal results.

Backed by Compass’ industry-leading technology and marketing platform, we ensure that every property receives maximum exposure and that every buyer has the tools to make informed decisions with confidence.

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Why Work With Us?

  • Top-Producing Team: The #1 Real Estate Team in Boulder and the #1 Mid-Size Team in Colorado

  • Unrivaled Market Knowledge: Backed by data-driven insights

  • Seamless Client Experience: From first showing to closing day

  • Compass Technology Advantage: Innovative tools for smarter buying and selling

Whether you’re looking to buy, sell, or invest in Boulder County, The Zach Zeldner Team is here to exceed your expectations.

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Meet Zach Zeldner

REALTOR® and Team Lead

Zach Zeldner is a leading expert in Boulder real estate, specializing in the luxury market. Known for his integrity and client-first approach, Zach delivers exceptional results in one of the nation’s most competitive housing markets. From luxury homes in Boulder’s most coveted neighborhoods to off-market opportunities, he offers unmatched insight, strategic guidance, and proven results.


ZACH ZELDNER

​​​​​​​Realtor®, Team Lead, Compass Founding Agent

(720) 480-7650 | [email protected]​​​​​​​​​​​​​​



Award-winning Boulder Realtor Zach Zeldner delivers extraordinary service and unmatched market knowledge in one of the country’s most sought-after residential enclaves. With 20 years of experience, he is a consummate professional known for his integrity, discretion, and client-first approach. Zach has been the #1 top-producing Compass Realtor in Boulder & Denver from 2019-2023 and was also the #1 individual Realtor in Boulder from 2019-2022. Recently recognized among the Top 50 Compass Realtors nationwide, he has closed over $1 billion in career sales, including $750 million since 2019.


Zach’s deep understanding of Boulder's real estate market, neighborhoods, housing stock, and schools ensures that clients receive expert, full-spectrum guidance. A fierce negotiator with an unparalleled work ethic, he creates customized strategies to exceed his clients' goals. As a Compass Founding Agent, he leverages industry-leading marketing, nationwide reach, and cutting-edge technology to deliver exceptional results.


Before launching Compass Boulder, Zach was a top producer at Re/Max Alliance on Walnut, where his team closed $450 million in sales from 2012-2018 and was repeatedly ranked among the state’s best. He earned multiple individual accolades, including Hall of Fame and Lifetime Achievement designations.


Originally from Connecticut, Zach attended The Loomis Chaffee School and the University of New Hampshire. A former soccer player, he now takes full advantage of Boulder’s outdoor lifestyle, frequently running the region’s trails and roads. When not working or running, Zach, his wife Jessica, and their two sons enjoy exploring Boulder and traveling on exotic surf trips.


Zach's Career Highlights

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  • #1 Compass Boulder Realtor 2019-2024
  • $1B+ Total Career Sales
  • $750M+ Sales Since 2019
  • Top 50 Compass Realtor Nationally in 2022
WILLIAM GREIG

WILLIAM GREIG

Realtor®
 
With an ideal combination of empathy, skill, and experience William has quickly become one of Boulder's well known real estate agents in the luxury sector. As it always does, the past informs the way William approaches work today. A former Division 1 Track and Field runner turned professional triathlete and small business owner, William is no stranger to hard work and dedication. Always striving to learn and grow, William also earned two Masters degrees from the University of Michigan, the second in Social Work with a focus on Interpersonal Practice and Mental Health.
 
What separates William from other agents is the combination of his people-centered approach and entrepreneurial nature. With an intense focus on achieving the best possible results for clients William maintains a people centered approach that recognizes the emotional component of any real estate transaction. This helps him to find individualized solutions that put the needs of clients first, always finding flexibility to accommodate the people at the center of this work.
 
William was originally drawn to real estate by his experience buying and remodeling his personal homes. A genuine people person, he leverages his knowledge and calming demeanor to deliver seamless, low-stress experiences for his clients. He has established a notable reputation for connecting deeply with buyers and sellers and helping them fine-tune their exact objectives. He addresses every situation with a level-headed approach. William truly thrives on helping everyone find their place to feel at home.
 
A New York native, William now resides in gorgeous Lake of the Pines with his wife Becca, their two daughters and their sweet pup, Bella. There, they enjoy taking walks around the lake, hiking, biking, paddle boarding, and swimming.
ETHAN BULLOCK

ETHAN BULLOCK

Realtor®
 
Ethan Bullock is an award-winning real estate professional nearing 20 years of experience in residential sales, marketing, construction, and development. Regardless of the scale or the complexity of the transaction, his solutions-driven mindset has established a strong record of success. With a focus on Boulder County and the surrounding area, Ethan's deep market knowledge and broad network of relationships create a unique and strategic advantage for his clients.  Outside of real estate, these days Ethan can likely be found on the sidelines at his daughters' soccer games or holding court at his favorite coffee shops. A committed athlete and early-riser, he's often in the gym or on single track getting his mind right before the sun rises. He has successfully completed numerous ultramarathons, skimo races, and various other endurance events throughout the US. Ethan has also recently found amateur boxing, and while mediocre at it, is enjoying learning the art of the sweet science. 

A proud father and husband, Ethan and Jeni call Louisville home and have two daughters who inspire and amaze (and terrify) on a daily basis. Ethan graduated from the University of Pennsylvania with degrees in Art History and Classics, and captained their D1 wrestling team.
AMANDA SALZMAN

AMANDA SALZMAN

Realtor®
 
To get the property you want, you need a seasoned professional with an intimate knowledge of the Boulder market, as well as a deep network of personal and professional connections that provide access to off-market listings. As inventory grows tighter in Boulder, Amanda proactively finds homes for her buyers before they come to market. Amanda typically finds deals through creative and collaborative efforts within her community - not on the MLS.
 
Amanda has been a top producing Realtor® in Boulder County for nearly a decade, winning numerous awards and recognition from her previous company, RE/MAX Alliance.
 
Amanda's expertise extends beyond the Boulder City limits. She is active in the surrounding mountain communities as well as Louisville, Lafayette, Longmont, Niwot, and Gunbarrel. Amanda understands the financial freedom that owning real estate can offer. She currently lives on a small farmette and owns multiple investment properties in Boulder.
 
Originally from the Midwest, Amanda's love for the outdoors and the Rocky Mountains drew her to Boulder. Her personal life is an exciting and fun mix of enjoying all the adventure and arts offered in Boulder and the surrounding areas. Some of her most memorable adventures include multiple rafting trips down the Colorado River through the Grand Canyon, running 50 miles through the Colorado Mountains between Vail and Aspen, and modeling for Patagonia Clothing Company.
 
Amanda graduated Summa Cum Laude from Southern Illinois University with a BS in Economics and a BS in Business Communication.
HILLARY HARRIS

HILLARY HARRIS

Field Director, Realtor®
 
Hillary is a licensed Realtor® and an integral member of the team. Hillary has lived in Boulder for over 10 years and has a great appreciation for Boulder and the surrounding areas. As an experienced buyer and seller of real estate, Hillary understands the dynamics of buying and selling property, the complex nature of each transaction, and the importance of each step throughout the buying and selling process.

Before her career in real estate, Hillary owned a successful catering and events company for 15 years in the San Francisco Bay Area. Hillary understands the challenges of running a small business, the balance of assisting multiple clients, and the importance of meeting dates and deadlines in a timely manner. Hillary takes great pride in ensuring that all aspects of a transaction are handled smoothly. When she's not working with clients, you can find Hillary racing up Mount Sanitas, doing Crossfit, or dreaming up new adventures for her and her two kids.
LAUREN O'NEIL

LAUREN O'NEIL

Director of Operations, Realtor®
 
Since 2007, Lauren has had the pleasure of being involved in hundreds of high-end real estate transactions for Boulder’s top agents, creating dynamic and innovative marketing campaigns, drafting and reviewing contracts, and working closely with buyers, sellers and agents to support a smooth and harmonious process for everyone involved.
 
A licensed agent, Lauren is deeply familiar with the ins and outs of the real estate market. She currently lends her expertise as Director of Operations to our team and works directly with buyers and sellers in Boulder County and the surrounding areas.
 
One of Lauren’s passions is creating elevated experiences for her clients. Her enthusiastic, customer-oriented approach puts others at ease and even makes the process of home buying and selling fun!
 
Originally from Los Angeles, Lauren found a true home when she first set foot in Boulder 16 years ago. Her love for the community has only grown through the years, as her appreciation for the lifestyle, the people, and the architecture deepens. When she’s not working, you might find Lauren enjoying the great outdoors with her husband, two sons, and their gregarious dog, Maisie.
CHELSEA HOPKINS

CHELSEA HOPKINS

Marketing Director
 
As the Marketing Director for the Zach Zeldner Team, Chelsea brings over 5 years of experience leading high-impact real estate marketing campaigns and a proven track record of driving results for top agents.
 
After graduating in 2014 from the Leeds School of Business at CU Boulder with a degree in Marketing, Chelsea launched her career at a tech startup in Boulder. She then honed her skills at a digital agency and in the finance industry before joining Compass Real Estate in 2019 as the first marketing hire for their Boulder office. Chelsea's passion for customer service, strategic mindset, and data-driven approach led to her rapid advancement within the company. She eventually became the Regional Marketing Manager, overseeing a team of five marketers and all marketing initiatives for Compass Colorado and its 1,000+ agents across the state.
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Now as the Marketing Director for Zach's team, Chelsea applies her wealth of real estate expertise to ensure every client receives exceptional support and sees outstanding results.
 
Outside the office, you can often find Chelsea embracing the Colorado lifestyle with her fiancé, whether it's hiking, snowboarding, mountain biking or camping, or cuddling with her two cats and reading a book.

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The Zach Zeldner Team is Boulder County's #1 Real Estate team. With $1.5B in sales since 2019, they combine concierge-level service and specialized in-house support to deliver exceptional results through unrivaled market expertise and relentless client advocacy.

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