
Your Resource for State-of-the-Art Plumbing and Hydronics in Southeastern Idaho & Western Wyoming
307 Mechanical was founded with a vision to provide unparalleled plumbing and hydronics services tailored for high-end custom builders and contractors in the Star Valley and Teton Valley areas. We understand the unique demands of custom construction projects and believe that every build deserves the highest level of craftsmanship and attention to detail. Our journey began with a passion for excellence and a commitment to partnering with contractors who share our values of integrity and respect, ensuring the success of every project we undertake together.
Respect
We value our partnerships and treat every project with the utmost care and attention. We foster a collaborative environment where mutual respect and open communication thrive.
At 307 Mechanical, Our Commitment to Excellence is Driven by a Set of Core Values that Define Who We Are & How We Work
These values are the foundation of our successful partnerships, ensuring that every project is executed with precision, professionalism, and mutual respect.
Integrity
Honesty and transparency are the cornerstones of our business. We believe in straightforward communication and ethical practices, ensuring that you are always informed and confident in our work.
Hardworking
We understand the importance of deadlines and quality. Our proactive approach and attention to detail guarantee that your project is in capable hands.
Genuine
Authenticity is at the heart of our interactions. We are dedicated to providing real solutions that meet your specific needs, ensuring that our contributions enhance the overall success of your project.
Enjoyment
We believe that passion and enjoyment are key to exceptional work. Our team loves what we do, and this enthusiasm is reflected in the quality of our services.
Community Minded
We are proud to be part of the Star Valley and Teton Valley communities. We believe in giving back and contributing to the well-being of the communities we serve.
Free Will
Empowerment and autonomy are integral to our approach. We trust our team and our partners to make informed decisions, fostering a culture of innovation and accountability.

Partnering with 307 Mechanical means aligning with a team that is committed to your success. Together, we can achieve excellence in every project.
Meet the Team
The core of 307 Mechanical is our dedicated team of experts who infuse passion, skill, and commitment into every project. Our success stems from the collective efforts of our team members, each playing a vital role in delivering exceptional service and ensuring the success of our contractor partnerships.
VISIONARY
Aaron McCormick

Plumbing expert & problem solver by day, adventure-seeker by heart. As the owner and visionary behind 307 Mechanical Inc., I take pride in delivering high-quality, reliable plumbing services to Star Valley, Jackson, and Eastern Idaho and beyond.
Raised in Star Valley, WY, I’ve built my business on integrity, craftsmanship, and a commitment to getting the job done right every time.
With years of hands-on experience, I specialize in new construction & remodels. My team and I are dedicated to providing expert plumbing solutions with precision, efficiency, and professionalism.
When I’m not working, I’m embracing adventure—surfing, yoga, hiking, stand up paddle boarding, free diving/ spear fishing, mountain biking, snowboarding, snowmobiling, traveling the world, and exploring great food. I bring that same energy and dedication into my work, ensuring my people receive exceptional service and long-lasting relationships.
INTEGRATOR
Brandon Merrill

As the Integrator at 307 Mechanical Inc., I am passionate about building upon an already strong foundation to create the premier plumbing and hydronic company in Star Valley, Jackson, and Eastern Idaho.
With 15 years of business leadership across various industries, I focus on strengthening the operational side of our company—because trust me, you don’t want me to handle the plumbing! My priority is to cultivate a strong, cohesive team that embodies our core values, thrives within our company culture, and is dedicated to mastering their craft.
Outside the office, I love spending time with my family and friends, whether we’re out in the snow, on the water, or exploring the trails. I also appreciate a long walk on the beach, a cold IPA, and making prolonged eye contact just to see who gets uncomfortable first—though I usually save that for my loving wife! Life is too serious to take too seriously, and I make sure to bring a little fun wherever I go.
Now It's Your Turn
Join Our Team
Ready to take your career to the next level with 307 Mechanical? We are always looking for talented, hardworking individuals to join our team. Click the button below to submit your application and start your journey with us.


As we continue to grow, our aim is to become the premier plumbing provider in Star and Teton Valleys. We are committed to embracing new technologies and innovative solutions to better serve our clients. Our focus remains on maintaining the high standards of quality and professionalism that have earned us the trust of our community.
SALES LEADER
Gabe Hoffmaster

GQ is what they call me around here, a nickname that reflects not just my occasional attention to personal grooming, but also my commitment to professionalism in everything I do. While maintaining perfect hair every day may be a stretch, here’s what I bring daily to my role at this great company: over ten years of plumbing experience, an unwavering dedication to quality, and a degree in business.
My background allows me to approach the Sales Leader role with both an educated perspective and a hands-on understanding of challenges in the field. I am dedicated to making 307 Mechanical an outstanding company by fostering standard-setting, unbreakable relationships across our entire supply chain. From proposals and scheduling to job walkthroughs and communication, I am committed to ensuring that every interaction with 307 Mechanical exceeds your expectations.
When I’m not in the office my pursuits turn to my amazing wife, bugling bull elk, exploring the mountains, guiding hunts during the fall, and creating a life I am proud to say I lived.
OPERATIONS LEADER
Ernie Quiroz

Beginning in Washington, winding through Idaho, making my way through Jackson Hole, to my permanent home here in Star Valley, my story is of mountains and the wilderness. “I wasn’t born in Wyoming, but I got here as quickly as I could”.
I am about the rugged, wild outdoor life. I find peace in facing the challenges of nature.
Whether I am high in the mountains, scouting for the perfect Buck, atop a hunting horse riding through the early morning darkness, or camping with friends, I love being challenged.
The wilderness pushes me to find the best of myself, just as my role as Operations Leader with 307 Mechanical Inc. does. My 18 years of experience in the plumbing trade have given me the training and knowledge necessary to lead the crews of our company. I take exceptional pride in guiding our crews, through the straightforward as well as more complex builds. I also consider myself a valuable bridge to our clients, as they too maneuver the challenges that may arise during their project.
I approach each job, with the same rugged determination, that I approach my outdoor adventures. My goal is always to find pride within myself as I review my work. Whether the task is a small bathroom remodel, or a custom luxury home, my responsibility is to ensure quality results for all our clients. Attention to detail and the pride that comes from giving my all, is the standard that I set for the crews of 307 mechanical.
Under my supervision any job that our company is given will most assuredly be executed in the most professional, timely and thorough manner possible.
FINANCIAL LEADER
Jenni Sireci

Hi there! I'm Jenni Sireci, a passionate bookkeeper with over two decades of experience. I'm a stickler for organization and streamlining, and I love creating efficient systems that help 307 Mechanical thrive. Building strong relationships grounded in professionalism and exceptional customer service is at the core of my approach.
When I'm not immersed in the world of work, I find true joy in spending quality time with my loved ones – friends and family are my bedrock. I have an insatiable wanderlust that takes me to new destinations, both near and far. Whether it's pitching a tent under the stars, casting a line into a tranquil lake, or discovering a hidden running trail, I'm always eager for new experiences.
Exceeding your expectations is my top priority.
You can trust that I will do everything in my power to ensure a seamless, efficient, and successful collaboration that leaves you delighted with the results on your project.
Our Services
With years of experience in the plumbing and hydronics industry, 307 Mechanical has become synonymous with quality and reliability.
CUSTOM PLUMBING INSTALLATIONS
HYDRONIC HEATING SOLUTIONS
At 307 Mechanical, Our Commitment to Excellence is Driven by a Set of Core Values that Define Who We Are & How We Work
These values are the foundation of our successful partnerships, ensuring that every project is executed with precision, professionalism, and mutual respect.
Respect
We value our partnerships and treat every project with the utmost care and attention. We foster a collaborative environment where mutual respect and open communication thrive.

Now It's Your Turn
Join Our Team
Ready to take your career to the next level with 307 Mechanical? We are always looking for talented, hardworking individuals to join our team. Click the button below to submit your application and start your journey with us.
Respect
We value our partnerships and treat every project with the utmost care and attention. We foster a collaborative environment where mutual respect and open communication thrive.