Engineering, Architecture, Planning

Bernie Bullert Rejoins TKDA’s Municipal Division

March 10, 2015

Bernie Bullert

Bernie Bullert, PE, is rejoining TKDA’s Municipal Division as a Senior Water/Wastewater Engineer.

Bullert is a well-known and respected leader in the regional and national water/wastewater engineering field. He worked for Saint Paul Regional Water Services for 35 years, 12 of those as general manager for the utility that serves more than 400,000 people. He recently served as Director of Water Treatment and Distribution Services for the City of Minneapolis and during his tenure managed an annual $75 million budget, improved drinking water quality and reduced water losses within the system. For several years, Bullert also served as Group Manager of TKDA’s Water/Wastewater Division.

At TKDA, Bullert will provide consulting services for utility management, planning, operations and capital improvements. He will also provide quality assurance for plans and specifications, as well as constructability and operability review for utility clients.

“With Bernie’s significant experience in managing large water utilities, TKDA strengthens its ability to offer our clients high-level consulting services,” said Dennis Postler, PE, and Vice President of TKDA’s Municipal Division. “We are extremely happy to have Bernie rejoin our team and bring his experience, leadership and long-term relationships to work for our Water/Wasterwater group.”

John Berrigan Joins TKDA’s Municipal Division

February 24, 2015

John Berrigan

John K. Berrigan Jr., PE, joined TKDA as Group Manager of Water/Wastewater in the Municipal Division.

Berrigan is a leader in the water/wastewater engineering field. He has been designing and managing projects for municipal clients in Minnesota and Wisconsin, and industrial clients in Minnesota and worldwide for more than 30 years. He collaborates with facility owners and regulators to provide practical and innovative solutions using a wide spectrum of treatment technologies.

Berrigan works with clients to provide insightful compliance strategy, alternatives analysis, facility planning, and technology selection and procurement. He has a proven track-record leading multi-office and multi-firm design teams and brings extensive experience in providing accurate cost estimating, resourceful value engineering, and strong bid management.

Berrigan has a master’s degree in chemical engineering from Michigan Technological University in Houghton, Mich., holds several U. S. Patents for water and wastewater treatment systems and components, and is the author of numerous articles on water treatment.

“John is recognized as an expert in the water/wastewater field and he brings a wealth of cutting-edge experience to our team,” said Dennis Postler, Vice President of TKDA’s Municipal Division. “He is well known to many of our clients and also brings new relationships to help us grow and strengthen our Municipal Division.”

TKDA staff worked with Berrigan on the recently completed water treatment and storage project for the City of Mankato.

“I am honored to be working with the experienced and capable team at TKDA and look forward to serving our municipal clients in Minnesota and Wisconsin, and our industrial clients to support their operations nationally and globally,” Berrigan said.

Leslee LeRoux Named VP of TKDA’s Marketing Division

February 18, 2015

Leslee LeRoux

Leslee LeRoux was named Vice President of Marketing and Business Development for TKDA.

LeRoux, who worked as Marketing Manager in TKDA’s Duluth office, has a strong background in business development, communications and staff management. Beginning her career as a University of Minnesota journalism graduate, LeRoux held several executive positions in the newspaper industry. Prior to TKDA, she worked as Senior Vice President for Project Management at the Area Partnership for Economic Expansion, a Duluth private sector marketing and business development organization. She also has extensive experience in integrating and developing branch offices in new markets.

“Leslee is a skilled communicator and business developer, experience that aligns with our growth strategies,” said Bill Deitner, TKDA President and CEO. “Leslee has been an excellent member of the TKDA marketing team and we are thrilled to have one of our own employee owners step up to this leadership position.”

Working from Saint Paul, LeRoux will continue to drive marketing efforts in Duluth and throughout TKDA’s additional branch offices in Chicago, Kansas City, Tampa, Irvine (CA) and Seattle. According to LeRoux, “This is an exciting opportunity to lead, refocus and refine an outstanding marketing division as TKDA enters a new phase of growth and market expansion.”

Contact Information:
Leslee LeRoux, Vice President, Marketing/Business Development
444 Cedar Street, Suite 1500, Saint Paul, MN 55101
651.292.4450 | 651.280.9393 cell |

Dennis Postler Named VP of TKDA’s Municipal Division

February 11, 2015

Dennis Postler

Dennis Postler, PE, has been named Vice President of the Municipal Services Division at TKDA.

Postler has worked for 30 years in municipal engineering, serving clients in Minnesota, Wisconsin, and California. At TKDA, he takes over a growing division that provides general city engineering services, roadway and public utility design, surveying, planning, transportation studies, and water and wastewater systems for municipalities, agencies, and industrial clients.

“I am proud to take this leadership position at TKDA,” Postler said. “Our team strives to build long-term relationships with our clients, and they trust us to provide on-going, quality services. While we are committed to our broad base of existing clients, our future includes expanding our services into new markets.”

Prior to joining TKDA in 2014, Postler held key leadership positions in other regional engineering firms where he focused on client service, operations, growth strategies, and staff development. At TKDA, he plans to add key leadership positions with expertise in identifying growth markets.

Elk Run Wins ACEC Award

February 2, 2015

Elk Run Interchange

TKDA and MnDOT were presented with a 2015 Engineering Excellence Honor Award for the Elk Run Interchange project at the recent American Council of Engineering Companies of Minnesota (ACEC/MN) banquet in Minneapolis.

TKDA was MnDOT’s lead design engineer on the project, which was completed in November 2013. TKDA designed one of Minnesota’s first Diverging Diamond Interchanges (DDI) as the centerpiece of the Elk Run Interchange along Trunk Highway 52 just outside of Rochester. This innovative design alternative accommodates higher traffic volumes than a traditional diamond interchange while offering increased safety, traffic calming, simple two-phase signal operation and easy access for pedestrians and bicyclists. The new Elk Run Interchange minimizes conflicts and modifies traditional traffic flows to improve turning efficiencies. The DDI design also eliminates the need for large interchange loops, which resulted in a shorter bridge length and smaller environmental footprint. The interchange and the connecting county roadway improvements are the latest phase of MnDOT’s efforts to upgrade TH 52 to a fully access-controlled freeway between Rochester and the Twin Cities.

CEAM Conference to Focus on Infrastructure Challenges and Solutions

January 23, 2015

St. Cloud Interceptor

Several members of the TKDA Municipal team will be sharing their expertise at this week’s City Engineers Association of Minnesota’s 2015 Annual Conference in Brooklyn Center.

On Wednesday, Brad Hammerquist, PE, senior registered engineer, will be part of the Trenchless Technologies Buffet session. He will discuss the applicability of the slip line pipe rehabilitation method and how TKDA designed slip linings with fiberglass reinforced pipe for 1.7 miles of the City of St. Cloud’s sewer interceptor system during the last year’s successful rehabilitation project. Our own Jim Studenski, PE, a senior registered engineer, will moderate this session.

On Thursday, Jim Studenski will moderate a session on MN 2050, with colleague Tom Eggum, a senior TKDA consultant, presenting on the efforts to educate Minnesotans on the importance of investing in public infrastructure. MN 2050 is an engineering-led effort that began in 2009 and this session update conference participants on the program’s impact, progress and ways to get involved.

The conference will be held at the Earle Brown Heritage Center Wednesday through Friday. For a complete list of presentations at CEAM 2015, log on to

TKDA Announces Several New Hires

December 22, 2014

New Employees at TKDA

TKDA recently added several new employees across multiple divisions and offices.

Registered Architect Wes Stabs, AIA, joined the Duluth office.

Several graduate engineers joined the firm, including Joel Hinnenkamp, Surface Transportation in Saint Paul; Will DeRocher, Municipal Services in Duluth, and Matthew Archer, Rail in Irvine, Calif.

Mechanical engineering designers Steven Fluger and Jim Nania joined Facilities Engineering in Saint Paul and architectural designer Itzi Velazquez was hired in Rail in Chicago.

Darrin Kiefer, Senior Human Resources Specialist and Office Assistant Martin Brueggemann also joined the Saint Paul office.

Andrew Penkava, PE, who joined the Structural Division in Saint Paul earlier this year, has recently been licensed as a professional engineer. 

Top Row from Left to Right: Wes Stabs, Joel Hinnenkamp, Will DeRocher. Center Row from Left to Right: Matthew Archer, Steven Fluger, Jim Nania, Itzi Velazquez. Bottom Row from Left to Right: Darrin Kiefer, Martin Brueggemann, Andrew Penkava.

Joseph Weaver to Lead TKDA’s Highway Group

December 8, 2014

Joseph Weaver, PE

Joseph Weaver, PE, has been promoted to Highway Group Manager in the Surface Transportation Division at TKDA.

Weaver has nearly 30 years of experience in all phases of highway engineering and project management. In his 18 years at TKDA, he has provided key engineering expertise and led the design team on numerous highway projects in Minnesota, including the Elk Run Interchange, I-35W St. Anthony Falls Bridge, and Trunk Highway 610 Continuation Project in Maple Grove.

Weaver succeeds Tim Chalupnik, who has been a leader in the Surface Transportation Division for 23 years. Chalupnik will be phasing into retirement beginning in January 2015.

“I am leaving the Highway Group in good hands with Joe as the manager,” Chalupnik said. “Joe is a true professional who combines exceptional technical expertise with outstanding client service.”

Chalupnik will continue to work for TKDA on a part-time basis as a senior engineer and advisor to the Highway Group.

“Tim has provided strong leadership, technical expertise, and mentorship,” said Kevin Cullen, PE, Vice President of the Surface Transportation Division. “He has set a high standard and will continue to be a valued resource for Joe and all of us at TKDA as we continue to provide quality service to our clients.”

Interview with TKDA’s Chief Executive Officer

November 17, 2014

Bill Deitner

TKDA President and CEO Bill Deitner talks about TKDA’s long history in Saint Paul and its growth plans for the future in this new interview with the Pioneer Press.







TKDA to present at Conference on the Environment

November 17, 2014

TKDA is a sponsor and a member of our team will be presenting at the 29th Annual Conference on the Environment, Collaborative Partnerships and Environmental Success in St. Paul this week. Stop by the U of M Continuing Education and Conference Center on the St. Paul campus Wednesday and take in the sessions. The event is sponsored by the Central States Water Environmental Association, Minnesota Section and the Air & Waste Management Association, Upper Midwest Section. For more information, log onto