Gray Matter Construction LLC | Concrete, Excavation, & Utility Company

(303) 993-3031

info@gmc.builders

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Meet Our Team

Gray Matter Construction began as a thought between four business associates and friends to simply do something a little different.  Having spent decades training and sharpening their technical skills and business acumen with ENR top contractors, they felt the corporate grind wasn’t where they would be most impactful on the industry and the community.  The name Gray Matter comes from our passion to build work “smart” in the concrete industry.  We put our clients first and strive to align our objectives with theirs.  We believe in continuous training and development for our employees so they can reach their maximum potential.  

Our Founders

Paul Rahfeldt

Founder and Director of Business

Paul's Bio

Paul graduated from the University of Nebraska-Lincoln with a degree in construction management and gained 10 years’ experience with a top 5 ENR contractor on projects from $1M to $2B. In 2022, he co-founded Gray Matter, where he oversees all financial, business, and project pursuits. Known for his analytical thinking and big-picture vision, Paul fosters collaboration and peak performance. He enjoys weekends with his wife and two kids, sneaks in golf, and returns to Nebraska to cheer on the Huskers.

Josh Dole

Founder and Director of Operations

Josh's Bio

Josh began his career as a construction management intern at Colorado State University and gained experience building water treatment facilities and bridges across California, Washington, Oregon, and Hawaii. Returning to Denver in 2015, he oversaw the construction of buildings, schools, hospitals, and data centers. In 2023, he co-founded Gray Matter Construction. Josh enjoys camping, fishing, and boating with his wife, Nicole, and their two children, Chloe and Asher, and is a devoted Colorado sports fan.

Bulmaro Aguirre

Founder and Director of Trade Personnel

Bulmaro's Bio

Bulmaro Aguirre began his career in 1999 in sheet metal roofing and siding, advancing from apprentice to journeyman with the Carpenters Union. He spent nearly two decades with union contractors before becoming Superintendent in 2018 and co-owner in 2023. Today, he directs trade personnel operations, from field supervision to recruiting and managing skilled workers with a people-first approach. Outside work, Bulmaro enjoys international travel, 4-wheeling, and horseback riding with his family.

Paul Nobiling

Owner/Founder & Director of Equipment & Logistics

Paul's Bio

Paul brings 34+ years of experience in heavy equipment operation to his role as Owner and Director of Equipment & Logistics. He earned his journeyman credentials in 2020 and a specialized substation license, and has excelled as a foreman operator overseeing complex projects, coordinating crews, and meeting with clients. At GMC, he has introduced advanced excavation techniques, optimized soil and demolition management, and ensured full compliance with safety standards. Known for his direct yet mellow communication and sense of humor, Paul fosters teamwork and camaraderie. Off duty, he enjoys boating, fishing, trying new restaurants with his wife, and spending time with family.

Our Gray Matter Family

Carlos Hernandez

Foreman

Carlos' Bio

Carlos brings 32+ years of experience to his role as Foreman at Gray Matter, leading ambitious projects. With expertise in concrete operations, he supervises crews, interprets blueprints, coordinates site logistics, and ensures safety and quality standards. His background spans residential, commercial, and major bridge projects, allowing him to combine technical knowledge with leadership to keep projects on track, on budget, and built to last.

Isaac Miera

Superintendent

Isaac's Bio

Isaac serves as Superintendent at Gray Matter, where he leads the management and oversight of construction projects with a focus on logistics, safety, quality, and team coordination. Drawing on his hands-on background—beginning as a foreman—he brings deep understanding and respect for every phase of both residential and commercial construction. With experience across a broad range of project scales, Isaac excels in organizing project workflows, fostering collaboration, and ensuring efficient execution. His leadership approach is rooted in field experience and adaptability, enabling him to guide teams through complex challenges with clarity and confidence.

Nate Gaines

Superintendent

Nate's Bio

As Project Superintendent at Gray Matter Construction, Nate brings over 30 years of experience and a passion for leadership to every job site. Since starting his career in 1990, he has managed complex, multimillion-dollar projects for both state and private clients, with a focus on security infrastructure upgrades and new construction. A proud Navy/Seabees veteran, Nate’s hands-on expertise spans electrical, plumbing, concrete, HVAC, and safety. He excels at coordinating subcontractors, overseeing logistics, and ensuring projects run smoothly from start to finish. Known for his strong communication skills and dedication to mentoring, Nate takes pride in developing the next generation of skilled workers while upholding the highest standards of quality and teamwork.

Chad Schneider

Superintendent

Chad's Bio

Chad brings nearly 20 years of construction and leadership experience to his role as Superintendent at Gray Matter. A U.S. Army and Navy veteran, he advanced from Carpenter’s Union apprentice to foreman and management roles, earning a B.S. in Project and Technical Management in 2014. Joining Gray Matter in 2023, he quickly became Superintendent, leading teams, coordinating contractors, and delivering projects on time and under budget. Chad enjoys family time with his four children, comic books, and movies.

Patrick Aldretti

Operations Manager

Patrick's Bio

Coming Soon

Mike Darr

Operations Manager– Southern Colorado & Concrete Division Manager

Mike's Bio

Mike Darr brings nearly 50 years of construction expertise to Gray Matter Construction, overseeing concrete flatwork and operations in Pueblo and Colorado Springs. Active since 1982, he has led projects from high-rise commercial buildings to dams and wastewater facilities, serving as senior concrete supervisor. His leadership and technical skills ensure the division meets the highest standards. Off duty, Mike enjoys off-roading, hunting, fishing, and family time with his five children, 14 grandchildren, and one great-grandchild.

Lindsey Dietz

Estimator

Lindsey's Bio

As Estimator at Gray Matter Construction, Lindsey brings precision, efficiency, and a client-first mindset, delivering accurate takeoffs and competitive estimates that drive revenue and foster strong client relationships. A natural collaborator, she promotes a positive, team-oriented environment to ensure projects are on time, on budget, and meet high standards. A Colorado native, Lindsey enjoys traveling, hiking, fishing, concerts with her husband, and supporting her two kids’ sports activities.

Lauren Govednik

Denver Area Project Manager

Lauren's Bio

Lauren is a Denver-area Project Manager who oversees every stage of construction, from preconstruction planning to execution and closeout. She collaborates with superintendents on scope, materials, vendors, contracts, and cost control, ensuring projects meet budget and client expectations. Her leadership on large projects, including the Pueblo 23 SSD Dam River project, has strengthened client relationships. Outside work, Lauren and her husband enjoy their 4-acre Colorado property, gardening, raising chickens, and caring for their two dogs.

Jayson Evangelista

Operations Manager, Director of Civil Operations

Jayson's Bio

Jayson brings 20+ years of expertise in environmental remediation and construction, focusing on groundwater treatment and infrastructure projects. At Gray Matter, he manages waterways, groundwater systems, piping, roads, bridges, and specialized builds like shooting ranges, ensuring projects are on time, on budget, and meet safety and quality standards. Certified in OSHA HAZWOPER and Confined Space, Jayson is known for integrity and team-focused leadership. Outside work, he enjoys skiing, shooting sports, and family time.

Jorge Villa

Superintendent

Jorge's Bio

Jorge has over six years of construction experience and joined Gray Matter Construction in 2023, leading with energy and a people-first approach. OSHA 30 certified, he combines safety expertise with motivating leadership, overseeing multiple crews and 25+ team members. From local park builds to projects at Denver International Airport, Jorge draws on his trades background to guide work efficiently and safely. Known for mentorship and growth, he fosters high-quality results while developing the next generation of builders.

Shelly Powers

Office Administrator

Shelly's Bio

Shelly Powers is Office & Compliance Manager at Gray Matter, keeping operations running smoothly while supporting compliance, managing new-hire paperwork, and ensuring every call is handled with professionalism. Since moving from Virginia in 2022, she has embraced the Colorado community, enjoying Castle Rock shopping and family time with her husband, son, and grandchildren. Actively involved in her church, Shelly combines reliable administrative support, regulatory expertise, and dedication to family and faith in all she does.

Angela George

Project Manager

Angela's Bio

Angela brings extensive experience managing multimillion-dollar infrastructure projects in Pueblo and Denver. She served as Project Manager on the award-winning Pueblo Water Works Park and led projects like the Dawson Trails expansion and El Paso County Emergency Watershed Project. Certified in OSHA, CDOT TECS, SWMP, and as a Colorado Associate Broker, Angela excels in safety, scheduling, and resource management, leading teams to deliver projects on time and within budget. She enjoys ranch life, raising livestock, gardening, and outdoor activities with her husband and children.

Heather Bly

AP/AR Specialist

Heather's Bio

With 15+ years in construction, Heather Bly serves as Office, HR & Compliance Manager at Gray Matter, overseeing compliance, payroll, HR, accounts, and vendor relations. She has restructured payroll, improved invoicing, revamped onboarding, and streamlined fleet and office management to support job sites efficiently. A devoted Colorado sports fan and mom, Heather enjoys camping, live music, cheering on her son’s lacrosse games, and following the Broncos, Rockies, Nuggets, and Avs, keeping family at the heart of everything she does.

Hector Villalobos

Foreman

Hector's Bio

Hector is a seasoned Foreman at Gray Matter with over 20 years of hands-on experience in concrete work and construction operations. His background is especially well-rounded, having worked across residential, commercial, and heavy civil projects throughout his career. Before joining Gray Matter, Hector spent several years at Kiewit, where he played a key role in some of the most complex bridge projects in town. His deep understanding of jobsite procedures and his leadership on large-scale concrete pours make him an asset to our biggest and most technically demanding projects. Hector’s versatility and calm under pressure continue to set the tone for quality and precision on every site he leads.

Joe Gonzalez

Operations Manager

Joe's Bio

Joe oversees daily operations on Denver-Metro projects, collaborating with superintendents and field teams on scheduling, pre-construction, and staff training. Since starting in 2003—from residential fencing to heavy civil and concrete infrastructure—he has served as Project Superintendent and Director of Safety, Health, and Fleet. In his current role, Joe drives safety, quality, and mentorship through hands-on leadership. Outside work, he coaches his son’s football team, fishes with his daughter, and enjoys hunting, kayaking, camping, travel, and family time.

Dara Servis

Earthwork Estimator

Dara's Bio

As an Estimator at Gray Matter Construction, Dara brings project management and problem-solving expertise, ensuring clarity across teams and leadership. Skilled in assessing needs and implementing solutions, she collaborates with peers, engineers, and clients to keep projects running smoothly. With strong analytical and negotiation skills, Dara supports accurate bids and drives project success. Focused on concrete, earthwork, and utilities, she is dedicated to delivering results that consistently exceed expectations.

Kenzie Gibreal

Project Engineer

Kenzie's Bio

Kenzie has worked in construction since 2017, specializing in estimation since 2020. Known for precision, professionalism, and collaboration, she coordinates with field teams, management, and clients to keep projects on schedule and budget. Highly detail-oriented and an excellent communicator, Kenzie tackles complex challenges with confidence, delivering high-quality results. Outside work, she enjoys cheering on the Denver Broncos and hiking outdoors with her partner and their two daughters.

Kyle Schneider

Construction Safety & Compliance Manager

Kyle's Bio

Kyle leads site-wide safety initiatives at Gray Matter, ensuring OSHA compliance and managing risks for secure, efficient job sites. A Navy veteran and certified diver, he brings technical expertise in underwater welding, pipeline work, oil rig construction, and shipboard systems. Former Safety Director and Foreman, Kyle mentors teams and veterans, applying his Master’s in Education to train in high-risk environments. Outside work, he enjoys travel, motorcycles, hunting, fishing, and camping, blending adventure, education, and leadership.

Matt Kramer

Office Engineer

Matt's Bio

Matt Cramer is Gray Matter’s Office Engineer, managing CAD drafting and IT support across two offices. With a Manufacturing Engineering degree and 7+ years in computer systems, they bring technical skill and efficiency to the team. Since joining, Matt has streamlined onboarding and upgraded hardware for smoother operations. Specializing in 3D modeling, drafting, and system troubleshooting, they ensure seamless design and functionality. Outside work, Matt enjoys 3D printing props and miniatures, combining technical talent with creative flair.

Casey McKee

Civil Superintendent

Casey's Bio

Since 2015, Casey has served as a Civil Superintendent, bringing construction and operator expertise, professionalism, and strong leadership. Skilled with excavators, dozers, loaders, and haul trucks, he holds OSHA 10, OSHA 30, and Ranken certifications. Casey fosters a respectful, team-oriented job site, solves problems with cost-effective solutions, and mentors the next generation of civil builders. Recognized for excellence in rock wall construction, he enjoys hiking, camping, and fishing outside of work.

Steve Cisco

Superintendent

Steve's Bio

Steve Cisco brings over 25 years of heavy civil construction experience as Superintendent. Beginning in 1998 as a laborer in Oregon installing fiber and telephone lines, he expanded into infrastructure, grading, excavation, and pond construction. After moving to Colorado, Steve mastered equipment operation, including excavators, loaders, skid steers, blades, and dozers. Now leading Gray Matter’s Terra Matter earthwork division, he sets high standards, motivates his team, and leads by example with dedication and a strong work ethic.

Christine Contreras

Business Marketing Director

Christine's Bio

Christine is a dynamic force in Denver Metro real estate marketing, with experience as an Executive Assistant, Realtor, and Property Manager since 2021. Skilled in client relations, creative marketing, and event hosting, she also runs a flooring business. A 2008 Cal Poly San Luis Obispo graduate and former Division I track athlete, Christine coaches high school and club athletes. Outside work, she enjoys Denver sports, live music with her husband, hiking, camping, and active participation in her church and community.

Sam Hernandez

Foreman

Sam's Bio

Sam brings more than two decades of concrete and construction expertise to his role as Foreman at Gray Matter. With a career that began at Kiewit, he’s developed a comprehensive understanding of field operations, safety practices, and the intricacies of large-scale project coordination. Sam’s focus and efficiency have earned him a place on some of our most ambitious projects, where his ability to manage crews and ensure top-tier results stands out. Highly respected by his peers and team members alike, Sam exemplifies consistency, craftsmanship, and strong leadership in every phase of the build.

Arturo Vasquez

Arturo's Bio

Coming Soon

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