11 files on the desk from Hartland, Wisconsin. 11 carry a net-worth figure.
President and founder, food-industry design-build construction firm · Hartland, Wisconsin
Brad Barke, president and founder of Hartland-based ESI Group USA (design-build for food distribution, processing, and refrigerated facilities). Not other Barke professionals outside ESI Group.
$5 million+
Brad Barke is president and founder of ESI Group USA, the Hartland design-build firm that plans and constructs climate-controlled food, beverage, pharmaceutical, and distribution facilities nationwide. The company began as Environmental Structures in 1991; Barke and partners incorporated in 1995, and by 2000 the firm had planted its corporate campus on an eight-acre Lake Country parcel in Hartland's corner of Waukesha County.
ESI markets a single-source model spanning site selection, process layout, architecture, engineering, and construction management. Firm materials credit more than 500 food-industry projects and a staff on the order of 70 professionals, with landmark work including a 902,000-square-foot WinCo Foods distribution center delivered in 14 months and long partnerships with operators such as US Foods, Sysco, UNFI, and Performance Food Group.
Barke's public bio cites more than 40 years in project management, estimating, and design-build of foodservice and processing facilities. He remains day-to-day president, responsible for operations, business development, and client relationships from the Hartland headquarters that anchors ESI's national cold-storage and food-plant work.
Orthodontist; practice principal · Hartland, Wisconsin
Dr. Daniel A. Holzhauer, DDS, MS — Marquette-trained orthodontist with a Hartland office (also West Bend and Wauwatosa). Joined father's practice 1985. Not other Holzhauer dentists outside this group.
$2 million+
Dr. Daniel Holzhauer is an orthodontist and longtime principal of Wisconsin Orthodontics, the multi-office Lake Country practice that maintains a Hartland clinic alongside West Bend and Wauwatosa locations. He joined his father's practice in 1985 after earning his D.D.S. (1983), M.S., and orthodontic certificate (1985) from Marquette University School of Dentistry; his father retired in 1992.
Practice materials note he has been selected in every Milwaukee Magazine poll of Top Orthodontists since the survey began in 1993 and has served as president of the Greater Milwaukee Dental Association and the Waukesha County Dental Society. Memberships include the American Association of Orthodontists, ADA, Wisconsin Dental Association, and Wisconsin Society of Orthodontists.
Holzhauer writes that he lives in the Lake Country area with his wife Nancy. The Hartland office is the named municipal lock for this city page, with additional Wisconsin Orthodontics clinics in West Bend and Wauwatosa.
Managing partner, wealth / private markets; owner, wood-products manufacturer · Hartland, Wisconsin
Derek J. Taylor, managing partner at Granite Harbor Advisors working from the firm's Hartland (Milwaukee-area) office; owner of Omnia Wood Products LLC. Former NAIOP Wisconsin chapter president; Village of Oconomowoc Lake trustee. Not other Derek Taylors.
$2 million+
Derek Taylor is a managing partner at Granite Harbor Advisors, the independent RIA that opened its Milwaukee-area office in Hartland when it hired him in October 2025 to lead a new private-markets vertical, Granite Harbor Capital, and the Mariner Fund I opportunity fund. BizTimes named him a Notable Leader in Wealth Management for 2026, citing work from the Hartland office into private equity, private credit, and commercial real estate access.
Taylor grew up in East Texas, earned a BBA in Finance and BA in Philosophy plus a J.D. from SMU, practiced at Michael Best and Husch Blackwell after moving to Wisconsin in late 2013, then shifted to operating roles—including COO of Three Leaf Partners—before joining Granite Harbor. Firm materials also identify him as owner-operating partner of Omnia Wood Products in the outdoor cooking category.
He is a former NAIOP Wisconsin chapter president and 2024 NAIOP Chapter President of the Year. He makes his home in the Village of Oconomowoc Lake—where he serves as a trustee—while anchoring Granite Harbor's Midwest presence from the Hartland office.
Owner and president, residential trades (plumbing, HVAC, electric, wells) · Hartland, Wisconsin
Eric Smith, third-generation owner/president of Hartland-based Austin Plumbing, Heating, Air & Electric (Team Austin). Not other Eric Smiths in Wisconsin trades or unrelated industries.
$3 million+
Eric Smith owns and leads Austin Plumbing, Heating, Air & Electric, the Hartland-based residential trades company BizTimes lists among its 2025 Future 50 winners. The firm traces to his grandfather Austin Smith and markets third-generation family ownership; today it bundles plumbing, HVAC, electrical, well-pump, and water-conditioning work for Southeast Wisconsin households from Hartland, Germantown, and Milwaukee locations.
Smith has grown the platform through legacy-brand acquisitions, including Haselow Plumbing & Heating, Luke N. Reuter Co., and—announced in March 2024 as the fifth deal—Integrated Building Solutions, which added electrical depth while keeping the company privately held rather than private-equity owned. BizTimes Future 50 copy puts the Hartland shop at about 40 employees and founded in 1939.
Company pages emphasize craftsmanship values, non-commissioned tradespeople, and upfront pricing. Smith publishes as Owner | President on Team Austin's About page, anchoring the brand's Hartland identity across its Lake Country and metro shops for residential service work.
President and owner, industrial hydraulic pumps manufacturer · Hartland, Wisconsin
Henry Guenther, president and owner of Hartmann Controls, Inc. (Hartland hydraulic/fluid-systems manufacturer founded 1948). Not other Guenthers without Hartmann Controls tie.
$2 million+
Henry Guenther is president and owner of Hartmann Controls, the Hartland manufacturer of industrial hydraulic pumps, servo Rol-vane motors, and related fluid-system components. Company materials say Hartmann has produced hydraulic and fluid systems for more than 60 years from its Hartland plant northwest of Chicago, serving railroad, construction, mining, energy, oil and gas, wood processing, and other industrial and mobile markets—including fire-resistant and bio-engineered fluids and DEF delivery systems.
Hartmann states it machines critical components in-house, functionally tests every fluid-control product before shipment, and holds ISO 9001:2015 certification, citing supplier recognition from customers including GE Energy and Caterpillar. LinkedIn lists Guenther as president since 2003 with owner responsibilities for strategic planning and returns for the ownership group.
That Hartland manufacturing base keeps Guenther's industrial-OEM leadership on the village page, even as the company ships pumps and motors into national rail, energy, and mobile equipment markets from its Lake Country plant.
President and CEO; Wisconsin market head, community bank · Hartland, Wisconsin
Jay Mack, president and CEO of Hartland-headquartered Town Bank, N.A. (Wintrust) since the bank's 1998 founding. Not other Jay Macks outside Town Bank/Wintrust Wisconsin leadership.
$3 million+
Jay Mack is president and chief executive officer of Town Bank and Wisconsin market head for Wintrust, leading the Hartland-based community bank he helped launch in 1998. After undergraduate and MBA degrees from the University of Wisconsin–Madison, he began at PNC Bank, later served as a commercial banking officer at M&I Bank and as executive vice president at Johnson Bank in Milwaukee, then joined Town Bank's startup team.
Under his leadership the bank has expanded across the Milwaukee metro—including downtown Milwaukee, Riverwest, and Whitefish Bay—and into the Fox Valley, while FDIC Call Report data show roughly $4.7 billion in assets as of mid-2026. BizTimes has repeatedly named him among Wisconsin's 275 most influential business leaders, tagging the company Hartland.
Mack serves on boards including Milwaukee Development Corp., the Greater Milwaukee Committee, Impact Seven CDFI, Cristo Rey Jesuit High School, Seton Catholic Schools, Near West Side Partners, and Marquette University's Economic Engagement Advisory Board. Town Bank's corporate headquarters remains in Hartland.
CEO, independent insurance agency · Hartland, Wisconsin
CEO of Hartland-based Vizance (formerly RC Insurance Services); son of founders Bob and Terri Cardenas. Not other Wisconsin Cardenas listings without Vizance/Hartland tie.
$5 million+
Jeff Cardenas leads Vizance, the Hartland, Wisconsin insurance agency his parents started as RC Insurance Services in 1978. Born the year the firm opened, he joined as an account executive in 2002 after a Citi investment-banking analyst stint, became president in 2008, and moved to chief executive officer in August 2024 when Tom Schaetz became president.
With childhood friend and partner Dimas Ocampo—teammates from Catholic Memorial High School football—he rebuilt the agency's sales culture by training new producers rather than only buying experienced books. The company rebranded as Vizance in 2017, has repeatedly landed on BizTimes Future 50 lists, and operates multiple Wisconsin offices from its Hartland headquarters.
Donegal Insurance Group has described Hartland as Vizance's hometown, matching Cardenas's LinkedIn location and the firm's published HQ. A University of Wisconsin–Madison BBA earned in 2001, with focus areas in finance and risk management and insurance, anchors the public education line.
Co-owner, garage door installation and service company · Hartland, Wisconsin
Joe Lindmark, twin co-owner (with Chad Lindmark) of second-generation Hartland Overhead Door. Not Erik Lindmark (team) or other Lindmarks; company serves Lake Country / Waukesha metro from its Hartland base.
$750,000
Joe Lindmark co-owns Hartland Overhead Door with twin brother Chad, running the second-generation garage-door installation and service company based in Hartland. The firm's About page says the family business has specialized in garage doors for 30 years, installing CHI, Amarr, and Clopay products for residential and light commercial customers across roughly a 25-mile Lake Country and metro Milwaukee radius, with a one-year labor warranty on installs.
Joe's LinkedIn lists him as owner since 1995 and as president of the Central States Door Dealers Association—Wisconsin Chapter since 2011, plus earlier Hartland Area Chamber board service from 2004 to 2009 that helped launch Lake Country Community Fest with the Delafield Chamber. The company showroom and shop remain in Hartland.
Team pages introduce Joe as married to Krissy and a father of three, underscoring the family-operated brand identity the twin brothers market across Lake Country and the Waukesha metro from their Hartland showroom base.
CEO and owner, thermoplastic injection molding manufacturer · Hartland, Wisconsin
Mark Eberhardt, CEO and sole owner of family-owned Retlaw Industries (Hartland plastics/injection molding, founded 1977). Not other Eberhardts outside Retlaw.
$4 million+
Mark Eberhardt is chief executive officer and sole owner of Retlaw Industries, the Hartland thermoplastic injection-molding company that began as a tool shop in 1977. In a MoldMaking Technology feature he describes adding sampling presses and, by 1982, asking customers why Retlaw should not mold their parts as well—today moldmaking is a smaller slice beside proprietary glass-filled nylon pulley production and custom OEM work.
The same feature places Retlaw in a roughly 50,000-square-foot Hartland plant with about 40 employees and about 20 injection presses (50–720 tons), splitting business between custom jobs and a proprietary 33% glass-filled nylon pulley line sold to lawn-and-garden, conveyor, fitness, and other OEMs. Eberhardt has publicly discussed hot-runner conversions that cut scrap, shortened cycles, and moved pulley molds onto smaller presses.
LinkedIn and directory listings identify him as president and CEO in Hartland since the early 1990s. The company still manufactures from its Hartland plant, keeping the industrial owner locked to the city page and Lake Country manufacturing corridor.
General dentist; co-owner, private dental practice · Hartland, Wisconsin
Dr. Richard L. Bailey, DDS, co-owner of Bailey Family Dental in Hartland (practice since 2001 with Dr. Terese H. Bailey). Not unrelated Richard Baileys; NPI/payment listings sometimes style middle initial E—lock to practice bio Richard L. Bailey DDS.
$900,000
Dr. Richard L. Bailey is a general dentist and co-owner of Bailey Family Dental, the private practice he and Dr. Terese Bailey opened in Hartland in 2001. The office serves Lake Country families with restorative and cosmetic dentistry; the Hartland Chamber has featured the practice for a grand re-opening ribbon cutting and community Golden Hammer recognition tied to the office.
Bailey's practice bio lists a B.S. from Ohio State University in psychology and zoology, an M.S. in neuroscience from the University of California, San Diego, a research fellowship at the University of Rochester, and a D.D.S. from the University of Illinois at Chicago. Memberships include the American Dental Association, Wisconsin Dental Association, Waukesha County Dental Society, American Academy of Cosmetic Dentistry, and the Dental Organization for Conscious Sedation.
Two decades of private practice in Hartland keep Bailey's clinician identity tied to the village's Lake Country dental corridor, chamber ribbon cuttings, and the family practice he and Dr. Terese Bailey still run together.
President and founder, employee-benefits third-party administrator · Hartland, Wisconsin
Timothy G. Pederson, president and founder (1987) of Hartland-based Diversified Benefit Services (DBS), a benefits TPA. Not Thrivent's Timothy M. Pederson (Verona) or other Tim Pedersons.
$5 million+
Timothy G. Pederson founded Diversified Benefit Services in February 1987 and remains president of the Hartland third-party administrator. DBS designs and administers account-based employee benefit programs—FSAs, HRAs, HSAs, ICHRAs, COBRA, and related compliance—and markets its proprietary Advanced Strategic Administration Program (A.S.A.P.®) software, which the firm says it owns and federally registered.
Pederson's published bio emphasizes benefits communication, plan design, and legislative advocacy for tax-preferred account-based programs. He is a member of the Employers Council on Flexible Compensation in Washington, D.C., has served on ECFC's national Legislative Committee and CMS subcommittee, and holds the Advanced Certification in Flexible Compensation. He previously served on Wisconsin's Joint Survey Committee on Retirement Systems and taught flexible-compensation coursework for the International Foundation of Employee Benefit Plans in Brookfield.
He graduated magna cum laude from UW–Platteville with a B.S. in Criminal Justice. DBS keeps its corporate office in Hartland, locking the benefits-TPA founder to the Lake Country address base that defines this city page.