Quality. Service. Excellence.
All One Safe Team
WE TELL IT STRAIGHT
ZERO PUNCH
WE SET THE STANDARD
PASSIONATE FOR WHAT WE DO
Elevating Together: Our Promise Beyond Construction
At Magnum, we build more than commercial spaces – we build partnerships. Through the unity of one team, we combine expertise and purpose across five trades, delivering not just finished buildings, but lasting relationships grounded in trust, transparency, and shared results.
Five Trades, One Team
Our depth of expertise spans five key disciplines: drywall, Division 10 specialties, plaster, acoustical ceilings, and painting and wallcoverings. Across each trade, our work is defined by precision, character, and a commitment to spaces that are as functional as they are refined. This is what sets Magnum apart as a commercial finishing contractor — the ability to bring all of it under one roof, one team, and one standard of excellence.
Built Your Way to Your Schedule
Magnum’s five divisions operate as a single, unified organization — engineered to deliver custom solutions on our clients’ timelines. When five trades move in coordination rather than in sequence, schedules tighten, communication improves, and outcomes are better. That is Magnum Synergy, and it is the foundation of everything we do.
All One Safe Team
Safety First. Team Respect & Collaboration. Family Outlook. Flexibility to Fit the Need.
Our people are Magnum’s greatest asset, and their safety is our highest priority — not just as a business obligation, but as a reflection of who we are. We hold ourselves to rigorous safety standards on every job site, and our low MOD rate reflects the sustained, daily commitment it takes to get there and stay there.
At Magnum, a long and healthy career is not just something we hope for our employees — it is something we actively build toward. Our culture of mutual respect, collaboration, and support creates the conditions for our team to perform at their best both professionally and personally.
We Tell It Straight
Honesty. Transparency. Own It! “You can count on me.”
Integrity drives every interaction at Magnum, internally and with our clients. Commercial construction moves fast, and when a challenge surfaces, the right move is always to address it head-on. Direct communication shortens the path to solutions and strengthens the trust that keeps long-term partnerships intact. At Magnum, we say what we mean and we deliver on what we say.
Zero Punch
“We do it right.” On Time. Without Complaint.
Quality is not a differentiator at Magnum — it is the baseline. We hold ourselves to a Zero Punch List standard on every project because doing the work right the first time is what our clients deserve and what our reputation demands. Meeting the deadline is non-negotiable. We plan thoroughly, adapt when needed, and execute without complaint, regardless of the scope or the pressure.
We Set The Standard
We Complete the Seemingly Impossible. Earn It Daily. Overcome Roadblocks. Empowered Employees.
Raising the bar in commercial finishing is not a seasonal initiative — it is something we earn every day. When schedules shift or unexpected challenges arise, Magnum responds with speed, performs under pressure, and finds a path forward. Our experienced team members are empowered to make real-time decisions that keep projects on track. We do not wait for permission to solve a problem. At Magnum, there are no problems — only solutions.
Passionate For What We Do
Welcoming Opportunities. Positive & Upbeat. Proactive Problem Solvers. Pursuit of Knowledge.
Our passion shows up in the quality of our finishes, the consistency of our communication, and the pride our teams bring to every job site. We approach projects with energy and a genuine eagerness to exceed what is expected. By staying at the forefront of industry trends, materials, and construction technology, we bring informed, creative problem-solving to every challenge. The success we build together translates directly into growth opportunities — professional and personal — for everyone on our team.
We Practice What We Preach
Magnum is a lead-by-example organization, and that starts with CEO Gary Robinson. The values that shape how he leads his life are the same values woven into every aspect of how Magnum operates. Watch the video to learn more about this well-deserved recognition.
Our Leadership Team
GARY ROBINSON
CEO
DAVID KIRST
CFO
EDDIE VARGAS
COO
SEAN NYSVEN
PRESIDENT
JEFF LAWRENCE
VICE PRESIDENT
ANABELA DA SILVA
PROJECT ASSISTANT MANAGER /
BID COORDINATOR
JANN MAXWELL
VICE PRESIDENT PAINTING AND WALLCOVERING DIVISION
BRIAN DIESBURG
DRYWALL/ PLASTER/ WOOD FRAMING DIVISION MANAGER
BRET CHANDLER
ACOUSTICAL CEILING DIVISION MANAGER
Mark Lovato
Painting & Wallcovering Division Manager
Leon Herder
SOUTHERN CALIFORNIA OPERATIONS MANAGER
PAINTING & WALLCOVERING DIVISION
David joined Magnum in 2012 as the Chief Financial Officer, where he serves as a key member of the executive management team. Prior to joining Magnum, David held the position of Chief Financial Officer at various privately controlled companies for many years. He also has a seven-year tenure in public accounting, culminating in his role as Senior Tax Manager at Grant Thornton. With over thirty years of experience in financial management, David brings a wealth of expertise to his current position.
David holds a Master’s degree in taxation and a Bachelor of Science degree in Business with a concentration in Accounting, both earned from San Jose State University. He is also a certified public accountant in the state of California.
Brian’s construction career began in high school building custom furniture, repairing fences, and assisting with home repairs for friends, family, and neighbors. His entrepreneurial spirit led him to work at a local lumberyard while continuing his side repair projects. Eventually, he joined a construction jobsite clean-up crew, where his hard work and dedication propelled him into a diverse range of construction disciplines under a local general contractor.
Within two years, Brian’s exceptional work ethic earned him a promotion to the position of Estimator/Foreman. In this role, he bid on projects and led a crew in completing various construction tasks, ranging from landscaping to roofing and everything in between. This experience provided Brian with a comprehensive background and extensive knowledge in different areas of construction. In the late 1990s, Brian established his own residential and commercial construction company before transitioning to manage a design and construction firm specializing in residential and commercial projects in the Oakland Hills.
In 2014, Brian joined Magnum as a Drywall Project Manager and has since risen through the ranks to his current position as the Division Head for Drywall, Plaster, and Wood Framing. Apart from his work at Magnum, Brian loves spending time with his wife, children, and grandchildren. He also enjoys pursuing outdoor activities such as hunting and fishing, as well as watching baseball, football, and various motorsports.
Within five years of joining Magnum, Jeff was invited to become one of the company’s shareholders. Soon after, he became Magnum’s first Vice President. Over the following two decades, Jeff played a crucial role in overseeing numerous large-scale projects in the field, contributing significantly to Magnum’s reputation and success as a company known for handling challenging projects with tight schedules. Jeff demonstrated excellent customer relations skills while also mentoring many of Magnum’s top field workers.
As Magnum expanded, Jeff’s expertise was increasingly required for mentoring and management responsibilities. From 2013 to 2018, he supervised Magnum’s Southern California office, regularly traveling between Southern and Northern California. Today, Jeff continues to train, oversee, and manage field personnel while also taking on special leadership projects. Outside of work, Jeff enjoys spending time with his wife Teresa, their children, and grandchildren.
Jann Maxwell grew up on a horse ranch in the Mohave Desert, where his first job involved changing lines in alfalfa fields. In high school, he demonstrated his talent for drafting and architecture, which he further pursued at Victor Valley College. In 1977, he earned his Architecture degree from Cal Poly San Luis Obispo. For several years following graduation, Jann taught drafting, architecture, and engineering at Lick Wilmerding High School in San Francisco
In 1979, Jann embarked on his career as a painting & wallcovering estimator at a commercial firm in San Jose. Over the next three decades, he held positions as Chief or Head Estimator at several prominent finishing contractors in the Bay Area. Since 2010, he has served as the head of the Painting & Wallcovering Division at Magnum, commuting weekly from his residence in Phoenix, Arizona. Throughout his 47 years in the industry, Jann has successfully managed some of the largest and most notable projects in the Bay Area. At Magnum, he takes on the responsibilities of training and mentoring the estimating staff while taking on special projects and unique estimating opportunities. Jann and his wife Kathy split their time between Phoenix, Arizona, and Florida, where one of their daughters and grandchildren reside.
Gary began his working career in 1978 as an apprentice drywall/carpenter. His cousin, Don Bowen, allowed him to work 3 days a week so that he could attend San Jose State University 2 days week. Gary completed his BA in Mathematics and made the decision to continue in the construction industry. After working for a few union drywall companies in the South Bay Area, Gary secured a fulltime position as an instructor for the apprenticeship program. His desire to continue to grow in the industry lead him to accept a position as an estimator. After building a good reputation in the Bay Area Commercial Construction arena, Gary decided the only future advancement available was to start his own company and one month after his daughter Devin was born, Magnum was born. Started with very meager means and a lot of can do attitude, Magnum not only survived the turmoil and challenges of a people based competitive industry, Magnum has grown to become a large respected contractor providing services including: Metal Stud Framing, Drywall, Acoustical Ceilings, Painting, Wall Coverings, Wood Framing, Plastering and Specialties for some of the best General Contractors who service the demanding and challenging building needs of some of the largest companies in the world.
At the ripe age of 20, Gary was given the opportunity for his first flight in a small two passenger aerobatic plane. He didn’t have much fun, but he realized that if he could learn to fly, “what couldn’t he do?”. With not much thought or sense and a $2,000 loan at 19 percent interest from Household Finance, he learned to Fly. Gary used his pilot’s license to further his career and education. He enrolled in Pepperdine University’s Executive MBA program to further his ability to manage Magnum’s success and continue its growth, flying there for classes. As the growth continued, Gary found opportunities in many forms and places including opening the Eagle Lake Lodge, The Saddle Rack and Magnum Aviation. He also earned a 3rd degree black belt in Mixed Marial Arts from West Coast Karate.
Currently, Gary continues to lead Magnum while prioritizing his family, including his wife, TJ, his daughter, his stepchildren and 8 grandchildren. Throughout his career, Gary has earned tremendous respect from the industry, employees, and customers. This is evident by the loyalty he has earned from Magnum’s employees and the quality of customers that have remained loyal for over 30 years.
Eddie began his career working alongside his father at Magnum while still in high school, during the summers of 1992-1993. After completing his high school education, Eddie continued to gain experience by leading taping crews for several years. In 2002, he was promoted to the position of Superintendent, a role he attributed to both his fluency in three languages (English, Portuguese, and Spanish) and his straightforward nature.
In the midst of the dot-com slowdown in 2001, Eddie found himself compelled to learn the skill of estimating drywall on commercial projects out of necessity. Then, in 2006, at the request of some of Magnum’s clients, he established Magnum’s Painting and Wallcovering Division. Once again, driven by necessity, Eddie taught himself how to estimate painting. His responsibilities grew as Magnum continued to expand its services, incorporating ceilings, painting & wallcoverings, specialties, and plaster. He successfully managed a workforce of over 700 union field personnel and currently works in collaboration with division heads to oversee a thriving company that has remained true to its original roots and core values.
Outside of his professional life, Eddie finds joy in raising cattle, farming, hunting, and spending quality time with his wife Suzie and their two sons.
Sean has been working in the construction industry since the age of 16. He made the decision to leave high school early and took on various jobs that provided him with diverse experiences. These roles included working on a commercial paving crew, serving as a union apprentice carpenter for home construction, and running his own fencing business on weekends and after work. Sean also gained knowledge in repairing silicon wafer etching machines, which eventually led to him becoming a service technician covering the western US. Sean earned his GED all while gaining valuable on-the-job experience.
In 1992, Sean worked with a family member doing installations for their school equipment company during evenings and weekends. In 1995,he obtained his general contractor’s license and became a partner in the family business, which expanded into commercial construction. In 2006, Sean took a significant step in his career by establishing his own commercial subcontracting company specializing in “Division 10” services. This allowed him to serve clients across California, with offices located in the Bay Area and on the Central Coast.
Since joining Magnum in 2014, Sean has taken on a leadership role as the Division Head of the Specialties Division. Through his efforts, Magnum has established itself as a major Division 10 subcontractor throughout both Northern and Southern California and has expanded Magnum’s collaborative finishing capabilities. In his free time, he enjoys golfing, traveling, and spending quality time with his wife of 25 years, two children, and their two French Bulldogs.
Anabela began her career in the high-tech industry in 1995 at Adobe Systems, as a phone operator. She steadily climbed the ranks at Adobe, eventually attaining the position of Media Project Manager Lead. In this role, she managed three global sites and oversaw the creation of initial images for 25 Adobe project releases, spanning 12 different languages. Anabela spearheaded the implementation of new automation tools to facilitate the maintenance of media content for all 25 products across multiple languages.
In 2010, Anabela transitioned to IBM, where she took on the responsibility of managing equipment across 32 centers worldwide, specifically within IBM IIC (IBM Innovation Centers). Her work focused on enhancing the performance of both existing and unreleased equipment. At the same time, Anabela continued her education, earning an Associate’s Degree in Accounting and a Bachelor’s Degree in Project Management.
Anabela joined Magnum in 2013, filling many roles and responsibilities, including managing the front desk, processing payroll, coordinating bids, and managing project assistants across all divisions. Currently, she plays a collaborative role on the Leadership Team, with a primary focus on bid coordination, evolving technology, and process innovation. She continues to serve as the Bid Coordinator and Manager for Project Assistants. During her free time, Anabela loves raising cattle with her husband, and spending time on the ranch with her husband, children, four grandchildren and extended family.
Bret, a native of Livermore, California, has dedicated the past 40 years of his career to the Bay Area Construction industry. His journey in construction began immediately after graduating from Granada High School in 1983, when he joined the Carpenter’s Union as an Acoustical Ceiling Installer. Through hard work and determination, Bret steadily advanced in his career, progressing to the position of Foreman. In 1995, he enrolled in classes focused on estimating and project management, which paved the way for his transition to office-based roles.
In 2016, Bret joined Magnum as an Estimator/Project Manager. Over time, he assumed the role of Ceiling Division Head, overseeing a team and providing valuable mentorship and training. Bret’s contributions extend beyond his division, actively participating in Magnum’s Leadership Team. While Bret dedicates himself to his work at Magnum, his primary focus is spending quality time with his wife, children, and two small grandsons. They enjoy fishing, boating, and spending time at their mountain cabin.
Mark then transitioned to outside sales for a leading coatings manufacturer, where he quickly became one of their top performers in total sales and new account growth. Within a few years, he was promoted to District Sales Manager, overseeing the largest division in the company. In this role, he managed 18 sales representatives and 23 retail stores, earning multiple awards for top sales revenue, new account development, and maintaining the most profitable district within the company.
After an equity firm acquired the company, Mark joined Magnum as the head of the Painting & Wallcovering division in early 2024 because of Magnum’s outstanding reputation for high service standards, customer satisfaction, and strong core values.
Mark and his wife, Rhonda, are avid motorcycle riders who enjoy traveling with friends throughout California and various parts of the country. In addition to biking, Mark also enjoys all sports and once fished as a professional bass fisherman. In addition, Mark and Rhonda find time to spend with their three children and four grandchildren.
A third-generation painter, Leon’s career began on high school summer breaks and evolved into a lifelong mastery of the craft. By his early 20s, he had already risen to the rank of superintendent, spending the next two decades specializing in the rigorous public works sector.
As Operations Manager for one of Southern California’s premier painting firms, Leon expanded the company’s reach into complex, high-profile facilities and arenas, including stadiums and theme parks. His leadership is defined by a “client-first” philosophy, and his success is furthered with a hand-picked team of professionals dedicated to delivering seamless, stress-free results on every large-scale operation.
We Are Family
At Magnum, you are not just on the team — you are family, and family comes first. We are invested in every employee building a long, rewarding career here. Through a can-do culture, continued investment in training, and a commitment to staying ahead of industry trends and technology, we give our people the tools to grow alongside the company. Every team member is empowered to leave a mark on every project they touch.

