Russ Lyon Sotheby’s International Realty is proud to announce the promotion of Derek Zieder from Director of Technology to Chief Technology Officer (CTO)—a move that reflects both his longstanding impact on the company and Russ Lyon’s continued investment in strategic, future-focused leadership.

With more than 25 years of experience in technology and 15 years dedicated to Russ Lyon Sotheby’s International Realty, Derek has helped shape the firm’s technology infrastructure and operational backbone. In his new role as CTO, he will continue to lead the company’s technology strategy and operations, ensuring that innovation, security, and scalability remain at the forefront of the organization.

Throughout his tenure, Derek has overseen critical areas including infrastructure, cybersecurity, automation, internal systems, integrations, and technology support for agents and staff. His steady leadership has helped create a reliable, seamless technology environment that supports productivity, strengthens collaboration, and evolves alongside the needs of one of Arizona’s most respected real estate brands.

But beyond the systems he builds, Derek is known for something harder to quantify: his calm presence and patience. Among friends and family, he’s recognized for always listening—even when it doesn’t look like it.

That steadiness has been tested in ways most people don’t realize. A few years ago, Derek battled West Nile meningitis, an experience he describes simply as “definitely not a fun one.” It’s a personal chapter that reflects the grit and resilience he brings to everything he takes on.

Outside of work, Derek’s discipline shows up in another way—he’s an avid endurance athlete, regularly cycling, running, and swimming, currently training toward an Ironman 70.3. His version of a reset after a busy week? A 50+ mile bike ride, followed by a Sunday off-day reserved for laundry and binge TV. And his favorite simple joy? Dark chocolate.

Derek’s promotion reflects both confidence and gratitude—recognizing a leader with deep institutional knowledge, technical expertise, and a clear vision for the future. Russ Lyon Sotheby’s International Realty congratulates Derek Zieder on this well-earned promotion and looks forward to the continued innovation and stability his leadership will bring in the years ahead.

A leader shaped by legacy, driven by excellence, and grounded in family.

Russ Lyon Sotheby’s International Realty is proud to announce the appointment of Bret Lamberson as President—a strategic leadership expansion that reflects the firm’s continued commitment to excellence, collaboration, and long-term growth. Bret will serve in this elevated role while continuing his responsibilities as Designated Broker, bringing together strategic leadership and operational expertise at a pivotal time for both the organization and the real estate industry.

Bret joined Russ Lyon Sotheby’s International Realty in 2005 and immediately recognized the brokerage as one that stood apart—from the strength of its leadership to the culture of professionalism that has long defined its reputation across Arizona. Early in his tenure, Bret was deeply influenced by the example set by Jim and Todd, who traveled to Northern Arizona and demonstrated what true expertise and integrity look like in practice. Their leadership and unwavering standards left an enduring impression and helped shape Bret’s own approach to supporting agents and strengthening the firm’s foundation.

Built over 78 years and spanning three generations, Russ Lyon Sotheby’s International Realty has established a legacy rooted not only in longevity, but in the strength of its people. Bret believes the company’s continued success is directly tied to the exceptional support provided to agents statewide—support made possible by dedicated leaders, managing brokers, and colleagues in every office who remain united by a shared mission and a culture of collaboration.

In addition to his extensive experience in brokerage leadership, Bret brings a uniquely valuable skill set as an attorney licensed in both Arizona and California. With a strong background in real estate transactions and litigation, he offers enhanced insight that strengthens company operations and provides meaningful support to agents navigating increasingly complex and high-stakes transactions. Over the years, Bret has worked closely with many of the firm’s top-performing agents statewide—relationships built on trust, consistency, and a shared commitment to doing business at the highest level.

Outside of work, Bret is known for his high energy and love of the outdoors. He’s a lifelong fan of 80’s music, and when he’s not working, you’ll often find him skiing, mountain biking, or surfing—though skiing remains his first favorite. “I love snow and sunrises and sunsets in high mountains,” he shares. He also believes strongly in staying active, noting that a solid hour of exercise each day helps him stay balanced and focused.

Above all, Bret finds his greatest joy in raising his two young children, ages two and four, with his wife Stephanie—calling it his “#1 joy,” and reminding others to “cherish every moment.” He is also passionate about giving back through the Russ Lyon Foundation, including supporting foster children and the company’s partnership with The Foster Alliance.

As President, Bret is focused on elevating expertise, strengthening collaboration, and guiding the firm forward with clarity and confidence—while staying anchored to the values that have defined Russ Lyon Sotheby’s International Realty for generations: excellence, integrity, and inspiration.

Onward and upward.

Russ Lyon Sotheby’s International Realty is proud to announce the promotion of Stephanie Stewart from Director of Finance and Operations to Chief Operating Officer (COO)—a strategic leadership appointment that reflects the company’s continued investment in operational excellence, long-term growth, and trusted internal leadership.

Stephanie’s career is defined by both depth and versatility, blending financial expertise, real estate insight, and steady leadership. After moving to Arizona following high school, she earned her degree from Northern Arizona University and began her professional journey in banking and mortgage—experience that sharpened her skill in financial strategy and business operations. She later gained additional professional experience in Southern California and Nebraska before returning home to Arizona.

What many may not know is that Stephanie’s career began in an unexpected place: the fashion industry in Los Angeles. That early chapter reflects what has remained true throughout her career—an eye for detail, strong discipline, and the ability to bring structure and vision to everything she touches.

In 2000, she joined Russ Lyon Sotheby’s International Realty as an agent and quickly stood out for her dedication and leadership. Over the years, she advanced through key corporate roles, including her promotion to Controller in 2016, where she streamlined processes and improved efficiency across the company. In October 2024, she was appointed Director of Operations and Finance, leading financial strategy and key operational initiatives.

Now, as COO, Stephanie will oversee a broader scope of organizational operations, strengthening systems, internal alignment, and sustainable growth across every office and department.

Outside of work, Stephanie is known for her vibrant personal life and strong connections. She loves to travel with friends and family and always has something planned. Recently, she’s been enjoying the excitement of decorating and organizing her newly remodeled home. When she needs to recharge, you’ll often find her taking a long walk with a podcast—or turning up 80’s music and dancing it out. Her favorite simple joy? Curling up with her two dogs and a great movie (or a British detective show).

In addition to her corporate leadership, Stephanie has served as President of the Russ Lyon Foundation since 2022, helping guide the company’s philanthropic mission and strengthening its impact across Arizona.

Stephanie’s promotion reflects both confidence and gratitude—recognizing a leader who brings clarity, discipline, and heart to everything she does. As Russ Lyon Sotheby’s International Realty looks ahead, her leadership will play a key role in shaping a strong and aligned operational future.