It all started back in 1950. Dr. Albert H. Halff hung out his shingle in Dallas and started the one-man consulting firm that has become one of the largest engineering companies in the Southwest. What was his vision? A company dedicated to developing smarter solutions.

Today, we continue Dr. Halff’s legacy of delivering smarter engineering and architectural solutions. Our Texas-based, employee-owned firm boasts a diverse professional staff across 15 unique offices. Halff delivers multi-disciplinary projects that provide the smartest solution and the best value.

Through a smart, agile management strategy, Halff has become an integrated provider of full-service engineering, architecture, environmental, planning, landscape architecture, right of way, surveying, and information technology services for public and private sector clients in the government, corporate, development, education, oil and gas, and transportation markets.


Our culture is what defines us; it’s who we are at the core. Halff’s culture is defined by five distinct characteristics:


We wholeheartedly believe that it is people who drive our firm. We would not be who we are without our exceptional employees who are keenly focused on providing outstanding service. Equally important are the relationships we have with our valued clients who entrust Halff to bring forth optimal solutions to the challenges they face.


You will never hear Halff described as “bureaucratic.” Yes, our leadership is involved and accessible, but our structure provides every opportunity for our professionals to be innovative and to grow and think outside the box.


Across all of our offices, Halff is a place where people collaborate rather than compete. It’s a place where there are no dumb ideas and every idea has the possibility of greatness.


There are no cutting corners here. Our clients deserve honesty and transparency, and we believe success only matters when it is achieved by always doing the right thing.


Quality is our cornerstone. Where other firms boast it, we actually provide it. And we are proud to be known for it.

“By far, Halff Associates has always been one of the best civil engineering consultants I’ve worked with. Their quality and attention to client satisfaction is first rate.”

– Commercial client

“We continually use Halff on projects due to the great quality of work and service provided.”

– Development client

“Halff provided excellent service and high quality through every aspect of the project. The City and project benefited from the firm’s expertise, collaboration, and professionalism.”

– Government client



Dr. Albert H. Halff, P.E., Ph.D.

Albert Henry Halff was born in Midland, Texas, on August 20, 1915. He earned his Bachelor of Science degree in Civil Engineering in 1937 from Southern Methodist University (SMU), and his Master of Science in Civil Engineering in 1942 from Illinois Institute of Technology. He married Lee Benson in Chicago on August 24, 1940. In World War II, he served as an officer in the U.S. Army Medical Corps. After the war, he became an associate professor of civil engineering at SMU. In 1950, he earned his Doctorate of Engineering degree from Johns Hopkins University.

On December 4, 1950, Dr. Halff founded “Albert H. Halff Consulting, Sanitary Engineers” in a one-room office in Snider Plaza, near SMU in Dallas. In 1953, Dr. Halff and his partner Allen Hundley each contributed $1,000 to form “Hundley and Halff.” In 1960, Dr. Halff amicably split with Hundley, and formed “Albert H. Halff Associates” in Dallas. Under Dr. Halff’s leadership, the firm became a pioneer in hydraulics, hydrology and floodplain management, and grew to be one of the largest independently-owned consulting engineering firms in Texas.

Dr. Halff has a legacy of distinguished service to his profession. In 1981, he was named by the Texas Society of Professional Engineers as “Texas Engineer of the Year.” He is a Fellow and Honorary Member of the Texas Section of the American Society of Civil Engineers (ASCE), and, in 1984, was awarded the “Award of Honor,” the highest award of the ASCE Texas Section. On February 27, 2004, Dr. Halff was awarded the School of Engineering “Hall of Leaders” Award from his beloved SMU. Dr. Halff holds 13 patents on engineering advances, including innovations in desalinization, water treatment, industrial-waste treatment and ion exchange.


Our actions will be driven by these values:

  • Ethical dealings at all levels based on the standards of our professions and the principles of fairness, integrity, honesty, candor and respect
  • Protection of the health, safety and welfare of the public
  • Delivery of excellence and exceptional value to our clients
  • Active support of our professions
  • Innovation
  • Protection and enhancement of the environment
  • Commitment to continuous improvement in technological skills and quality of our services
  • Participation in and service to our communities
  • Support of our employees and their families



The practices of engineering and architecture are the front line of influence on the natural world and its ecosystems. Because of this, our firm has a special responsibility to protect the environment for future generations.

Sustainable solutions have been integral to Halff’s design practice since its founding. Early in the firm’s history, our floodplain management studies included extensive inventories of flora and fauna in watersheds at a time when flood protection was the only real public concern. In the 1960s, the firm pioneered the preservation of floodplains in Texas.

Today, sustainability is at the core of Halff’s design practice. The firm creates sustainable designs that appropriately conserve materials, energy and water, and enhance the relationship between the built and natural environment. We recognize our responsibility as stewards of the environment and seek balance between technology and nature.


Our firm strives to develop long-term relationships of loyalty and trust with our clients. We do not see our services as a commodity, but rather we focus on delivering the best value. We see quality and innovation as differentiators between Halff and other firms.

We only provide services for which the firm is competent and can provide full value for the client.

We proactively seek the best, most creative solutions to our client’s needs.

We rigorously apply the firm’s quality management program to all projects to ensure that work products meet the firm’s standards, satisfy client requirements, fit the purpose, and are right the first time. We see every Halff employee having a role and responsibility in delivering quality to clients.


Halff’s results-oriented management team has long been committed to providing smarter solutions that result from collaboration and a distinctly personal touch. This passion for personalized service flows directly from Albert Halff’s belief that a company is nothing more than the sum total of its people. By nurturing individuals and providing trust and autonomy, all the teams of the organization are unleashed to pursue the best possible solution, the best possible way. Our clients deserve no less.

Patrick Kunz, PE President

Roman Plugge, PE COO

Greg Kuhn, PE, FSAME CMO
Russell Zapalac, PE CSO

Russell Killen, PE, CFM Executive VP
Mark Edwards, PG Executive VP

Patrick Kunz, PE

Pat joined Halff in February 1981 as a civil engineer, was appointed COO in 1997 to oversee company operations, and became President in 2013. He plays a key role in Halff’s corporate strategy and is focused on further diversifying our service portfolio and continuing our growth. Pat is passionate about Halff and our exceptional people. “I beam with pride over our incredible staff! I believe that the people of Halff truly are unique. Company-wide, we are people of high integrity. We treat each other with respect, and we work in an environment of camaraderie. There’s a palpable energy here; we’ve got bright young talent who bring great ideas to the table and seasoned experts who bring years of wisdom — a combination that provides optimal solutions for our clients.”

Dedicated to promoting the engineering industry, Pat currently serves as the National Delegate for the Texas Society of Professional Engineers (TSPE) and on the Texas A&M Civil Engineering Advisory Council. For years, he has volunteered his time to the YMCA, including serving on the YMCA of Metropolitan Dallas Properties Committee and the Lake Highlands Family YMCA Board of Managers overseeing the building of the Lake Highlands YMCA. When he is not fishing or golfing, his “one big family of Aggies”— wife Kathy and their three children — are cheering on their alma mater.

Roman Plugge, PE

Roman kicked off his Halff career in 1978 as a co-op student earning $3.75 per hour and received a handsome 50-cent raise only six months later. Dr. Halff later sent him to London for a year as an exchange engineer at Mott, Hay and Anderson, where he worked on the approach roads to the Channel Tunnel. Since then, he has worked on hundreds of land development projects, including more than 100 in Mexico. “One of the things that causes people to stay at Halff is the ability to chase your dreams and work on interesting projects.” Roman became Executive Vice President in 1997 and then COO in 2013. He oversees and shepherds the production teams.

Roman was a TSPE Math Counts teacher for eight years and currently serves on the boards of the McKinney Avenue Transit Authority and Bishop Lynch High School. He is an avid traveler, a classical pianist, and a connoisseur of single malt scotch. Roman’s Aggie family of six includes his wife, Sharon, and four grown children.

Greg Kuhn, PE, FSAME

Joining Halff in 1983, Greg began his career as a civil engineer with a focus on land development and infrastructure improvements, but he soon became interested in how clients selected engineers. “I was curious about discovering what clients want and how best to meet those needs. This interest led me to expand my career to the marketing and business side while still maintaining ties to the technical side.” Since 1998, he has directed Halff’s business development and strategic teaming efforts.

Greg gives back to the industry through board and committee service, including the Society of American Military Engineers (SAME), where he has served in elected positions both locally and nationally. He takes pride every year in being part of the SAME committee that awards scholarships to graduating high school seniors who will study engineering as well as the Society’s efforts to support the Wounded Warriors Foundation. Greg resides in Dallas and has been married to his wife, Wendy, since 1992. Their daughter followed in Greg’s footsteps and majored in civil engineering at Rice University.

Russell Zapalac, PE

Russell is the most recent addition to our management team, joining us as Chief Strategy Officer and Executive Vice President.  Prior to coming to Halff you could say, in the famous words of Johnny Cash, “He’s been everywhere, man.”  Not only did he move around Texas as a young boy, but his career has taken him from Miami to Anchorage and almost everywhere in between to work on all sorts of civil engineering projects, primarily large transportation facilities. He’s worn many hats – contractor, consultant, and owner – and he is known nationally as an expert in public-private partnership projects.

Russell earned his bachelor of science in civil engineering from The University of Texas at Austin.  He sits on the Board of Directors for the American Road and Transportation Builders Association and was the organization’s 2014 Public Sector Entrepreneur of the Year.  He also serves on the Transportation Transformation Group’s Executive Committee.  Russell “grew up on the water” and is an avid outdoorsman.  When he’s not working, you will likely find him spending time on Lake Travis in Austin or in Colorado with his wife, Kim, and his son’s family. 

Russell Killen, PE, CFM

Russell earned his Bachelor of Science degree in civil engineering in 1983 and joined Halff that same year. Over the years, he has led a wide variety of engineering projects for the public and private sector, serving as project manager and principal-in-charge on numerous rewarding assignments in the fields of water resources, public infrastructure, and land development. “I have loved the different challenges I’ve been able to take on at Halff. Working on a variety of projects keeps you on your toes, promotes learning, and broadens your perspective.” Russell is a recognized national water resources expert and author of several technical papers and journal publications. He has served on Halff’s Board of Directors since 2006 and managed our Fort Worth branch office from 2010 to 2014, when he assumed the role of Executive Vice President overseeing company-wide business operations.

Russell actively supports the engineering industry and serves on the American Council of Engineering Companies (ACEC) Tarrant County Board of Directors. A civic-minded person, he is a Leadership Fort Worth graduate, and has served as an adult leader in his church youth group and with the Boy Scouts of America. Russell is a lifelong resident of the Fort Worth area and now makes his home in North Richland Hills with his wife Teresa and their three children who are all entering the accounting field.

Mark Edwards, PG

Mark started his career as a petroleum geologist in 1984 and joined Halff in 1990. He started with the Environmental Team at Halff and initiated the Oil and Gas Services Team in 2006. “I’m truly inspired by the exceptional people of Halff and driven to expand our reach through growth, as growth creates opportunities for our people. The environment at Halff is entrepreneurial. We provide our Team Leaders autonomy and flexibility to achieve their goals while working collaboratively to provide a responsive quality service to our clients.” Mark has served on the Halff Board of Directors since 2013 and assumed his current role as Executive Vice President in 2015.

Mark is an active supporter of the petroleum industry, serving on the Board of the North Texas Gas Processors Association. In addition, he has served multiple terms on the scholarship committee where college students who will enter the petroleum industry are awarded financial assistance. He is an active member of the Halff philanthropic committee and organized several volunteer events at the Ronald McDonald House in Dallas. Mark lives in Plano where he was a youth basketball, football, soccer, and baseball coach and President of the Plano Senior High School JROTC Booster Club Board. He is married to Desiree, and their favorite pastime is spending time with their three children who are “amazing people.”



Award: Engineering Firm of the Year, Rio Grande Valley Chapter Associated General Contractors


Project: Marble Falls Comprehensive Plan Update 2016
Award: APA Texas Chapter 2016 Comprehensive Planning Award

Project: Marble Falls Comprehensive Plan Update 2016
Award: APA Texas Chapter Central Texas Section 2016 Comprehensive Plan of the Year Award

Award: Austin American-Statesman Top 100 Places to Work

Award: Houston Chronicle Top 100 Places to Work

Award: Southern Methodist University Cox Dallas 100

Award: Dallas Business Journal Middle Market 50

Project: Old Spanish Walking Trails and Flood Control Basin
Award: 2016 American Public Works Association Texas Chapter Project of the Year Award for Environment Projects $25-$75 Million

Project: Old Spanish Walking Trails and Flood Control Basin
Award: ACEC Texas Engineering Excellence Awards; Gold Medal Winner

Project: Trinity Forest Spine Trail
Award: Texas Trails Network Great Texas Trail Head-Planning/Design Award


Project: Trinity Forest Spine Trail Master Plan
Award: 2015 Excellence in Planning Award; Texas Recreation & Park Society

Award: 2015 Hot Firm; Zweig Group

Award: Southern Methodist University Cox Dallas 100

Award: Dallas Morning News Top 100 Places to Work

Award: Austin American-Statesman Top 100 Places to Work

Project: GBRA/USACE/TWDB Interim Feasibility Study
Award: ACEC Texas Engineering Excellence Awards; Gold Medal Winner

Project: TRWD Real-Time As Built Solution
Award: ACEC Texas Engineering Excellence Awards; Silver Medal Winner

Project: Bryker Woods Waterline Rehabilitation
Award: ACEC Texas Engineering Excellence Awards; Silver Medal Winner


Award: 2014 Best Firms to Work For; Zweig Group

Project: Cedar Hill Parks, Recreation, Trails & Open Space Visioning Master Plan, Cedar Hill, Texas
Award: 2014 Planning Excellence Award; Texas Recreation & Park Society (State Award)

Project: Cleburne Downtown Master Plan
Award: Midwest Section Texas APA 2014 Award

Project: Cedar Hill Parks, Recreation, Trails & Open Space Visioning Plan
Award: Texas Recreation and Parks Award – Excellence in Planning

Project: Sugar Land Pedestrian and Bicycle Master Plan
Award: Texas Chapter American Planning Association 2014 Project Planning Award

Project: Brownsville Bicycle and Trail Master Plan
Award: Texas Trails Network 2014 Award

Project: Richardson Heights Recreation Center
Award: 2014 Topping Out Award

Project: SM Wright Freeway Reconstruction
Award: Greater Dallas Planning Council Urban Design Award – Dream Merit Study


Project: Kennedale Comprehensive Plan, Kennedale, Texas
Award: 2013 Comprehensive Planning Award; American Planning Association (Texas State Award)

Project: Southwest Nature Preserve, Arlington, Texas
Award: 2013 Park Design Excellence Award; Texas Recreation & Park Society (North Region)

Project: Belleview Pedestrian Bridge, Dallas, Texas
Award: 2013 Merit Award for Design; American Society of Landscape Architects (Texas Chapter)


Project: Cedars West Urban Mixed-Use Development, Dallas, Texas
Award: 2012 North Texas LID Design Challenge Winner; Texas Land/Water Sustainability Forum

Project: Buda 2030 Comprehensive Plan, Buda, Texas
Award: 2012 Comprehensive Planning Award; American Planning Association (Texas State Award)

Project: 2012 Project Planning Award; American Planning Association (Texas State Award)
Award: 2012 Merit Award for Design; American Society of Landscape Architects (State Award)
2011 Park Design Excellence Award; Texas Recreation and Park Society (State Award)
2010 Park Design Excellence Award; Texas Recreation & Park Society (North Region)

Project: Ponte Avenue Bridge, Addison, Texas
Award: 2012 Gold Medal Award Winner; American Council of Engineering Companies - Texas

Project: West Fork Trinity River 2-D Analysis, Grand Prairie, Texas
Award: 2012 Gold Medal Award Winner; American Council of Engineering Companies - Texas

Project: FloodFUND Research Project, Texas
Award: 2012 Gold Medal Award Winner; American Council of Engineering Companies - Texas

Project: San Antonio Bicycle Plan, San Antonio, Texas
Award: 2012 Great Texas Trail Head Planning/Design Award - Public Entity; Texas Trails Network

Project: Lewisville 2011 Trails Master Plan, Lewisville, Texas
Award: 2012 Great Texas Trail Head Planning/Design Award - Public Entity; Texas Trails Network


Project: Coppell Town Center Plaza, Coppell, Texas
Award: 2011 Park Design Excellence Award; Texas Recreation & Park Society (State Award)


Project: Notre Dame Catholic Church, Houston, Texas
Award: 2010 Excellence in Worship; Texas Construction magazine

Project: Remington Medical Resort of Richardson, Richardson, Texas
Award: 2010 Excellence in Health Care Project; Texas Construction magazine

Project: Downtown Oak Street Renovation, City of Roanoke, Texas
Award: 2010 Best Public Improvements Award; Texas Downtown Association

Project: Coppell Town Center Plaza, Coppell, Texas
Award: 2010 Park Design Excellence Award; Texas Recreation & Park Society (Region III)

Project: Historic Fort Worth Stockyards Master Plan, Fort Worth, Texas
Award: 2010 Project Planning Award; American Planning Association (Texas State Award)

Project: South Tributary Regional Flood Control Project, New Braunfels, Texas
Award: 2010 American Public Works Association Texas Chapter Project of the Year Award for Environment Projects $2-$10 Million


Halff is not just committed to our clients, we’re committed to our communities. That’s why we’ve established the Halff Community Initiative, a 501(c)(3) non-profit organization designed to give back our “time and treasures” to the communities in which we live and work. We’re busy giving back through initiatives such as Ronald McDonald House, Meals-on-Wheels, Salvation Army, and many, many more.

We are also committed to helping develop the next generation of engineers and architects. That’s why we help provide scholarships for gifted students at a variety of universities across the Southwest. It’s also why our leadership actively serves on university boards and remains active in a variety of professional organizations.


Halff encourages and guides our clients to consider sustainability as an important factor in creating and developing projects that take into account the well being of people, economic stability, and environmental integrity. Our goal is to design projects that use energy and resources sustainably, at a rate that does not compromise the natural environment or the ability of future generations to meet their own needs.

Halff’s LEED Accredited Professionals and Envision Sustainability Professionals have the expertise to provide guidance and support in designing buildings that meet the US Green Building Council’s criteria for sustainable design as defined by the LEED (Leadership in Energy and Environmental Design) program and civil projects that meet the Institute for Sustainable Infrastructure’s criteria for sustainable design as defined by the Envision program.

Halff’s philosophy for developing sustainable projects is as follows:

  • We aim to design buildings, sites, and infrastructure that use less energy, water, and natural resources; generate less waste; and minimize the impact on land compared to conventional design, construction, and maintenance techniques.
  • We regard site and landscape design as an opportunity to clean air and water, sequester carbon, reduce pollution, and restore habitat and biodiversity, while providing social and economic benefits to the immediate site and surrounding region.
  • We utilize stormwater management techniques that include bio-retention, rain gardens, and permeable pavement for green infrastructure/LID (low impact development).
  • Our goal with green infrastructure is to promote infiltration, reduce stormwater pollution through bio-filtration, reduce impervious cover, and reduce long-term maintenance costs.