is more than a motto at HDA,

it’s the philosophy we live by. In 1986,

Jack Holleran, President of HDA, envisioned a professional service firm providing 

creative and timeless design with 

exceptional customer service. Our staff 

provides architecture, interiors and 

master planning services across these diverse sectors: 

BEVERAGE

 

INTERIORS

OFFICE

MULTI-FAMILY & HOSPITALITY

RETAIL & COMMERCIAL

DISTRIBUTION & WAREHOUSING

IT STARTS WITH A VISION

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MANAGEMENT
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PRESIDENT

JACK
HOLLERAN

As President of HDA, Jack reinforces strong leadership within the company, taking an active role in programming, conceptual design, and project strategy.  Jack chairs the Executive Management Team while his 46 years of experience includes various projects ranging from Beverage, Office, Interiors, Multi-Family & Hospitality, Retail & Commercial, and Distribution & Warehousing.

636.449.2450

jholleran@hdai.com

VICE PRESIDENT 

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PATRICK HOLLERAN

Patrick oversees business development initiatives and pursuit strategies for all market sectors. He utilizes his strong interpersonal skills to establish solid client and consultant relationships. Additionally, Patrick works closely with the local and national trade publications making sure each HDA client’s project is covered and published appropriately. Patrick plays a key role in HDA’s operations and assures our image

and core values are well represented.

314.780.1204

pholleran@hdai.com

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With the newly created role of Managing Principal, David will play a key role in mentoring new architects and expanding our portfolio. His 35+ years of experience in the design and construction industry make him perfectly positioned to take advantage of opportunities for growth and marketplace expansion. His oversight on corporate objectives, implementation plans, profitability and professional development will ensure HDA's future success.

DAVID W.
KEHM

MANAGING PRINCIPAL

636.449.1175

dkehm@hdai.com

DIRECTOR OF OPERATIONS/

SENIOR PROJECT MANAGER

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BRICE
ZICKUHR

As Director of Operations, Brice’s primary duties include overseeing day-to-day office activities, managing resources, and schedules as well as quality control. He also provides oversight of all of the construction documents completed by HDA’s project teams, reviewing the drawings throughout their development and sealing and signing the drawings for submission to jurisdictional authorities. 

314.616.2826

bzickuhr@hdai.com

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As the Accounting & Office Manager, Kathy manages the firm’s financial direction and obligations and develops and maintains the HR system.  She works in conjunction with the President, Vice President, and Director of Operations.  Kathy has been a dedicated HDA employee for over 14 years and decided that HDA was the best fit for her, because of the “family-like” atmosphere of the company.

KATHY
ZIELINSKI

ACCOUNTING

& OFFICE MANAGER

636.449.2456

kzielinski@hdai.com

INTEGRITY 

ACHIEVEMENTS

OVER $3 BILLION IN

CONSTRUCTION

 

OVER 30 YEARS IN BUSINESS

 

DESIGNED OVER

16 AUTO DEALERSHIPS

 

OVER 100 MILLION SF

DESIGNED ACROSS THE COUNTRY

 

DESIGNED THE FIRST

SILVER LEED CERTIFIED LEXUS

DEALERSHIP IN THE COUNTRY

DESIGNED OVER 100

OFFICE BUILDINGS

 

REGISTERED IN 40 STATES

 

DESIGNED OVER 250

INDUSTRIAL PROJECTS

 

DESIGNED OVER 165 BEVERAGE

DISTRIBUTION FACILITIES

 

DESIGNED THE FIRST

LEED CERTIFIED OFFICE

BUILDING ST. LOUIS

CORE VALUES

 QUALITY 

PROFESSIONALISM 

CAN-DO-ATTITUDE 

CREATIVITY 

INTEGRITY