The expertise of the firm's principals has enabled Muller to
undertake a broad range of civil engineering projects for clients in
the metropolitan area of Denver and throughout the state of
A. GRAY CLARK, PE, President
assumed the role of President in 2014 and in addition to overseeing
the day-to-day operations of the firm, he continues to serve as
project manager/principal-in-charge on some of Muller's major
transportation projects. His experience includes management of
projects ranging from single intersections to interstate and
arterial highways. He has managed feasibility studies, environmental
studies, and final design projects. Some of Gray's major
transportation projects include West Quincy Avenue from South
Kipling Parkway to South Wadsworth Boulevard, the US 50 Corridor in
Gunnison and Montrose Counties, and I-25 North from SH 56 to SH 402.
He has been with Muller Engineering Company for 24 years of his
28-year career, and he served as Corporate Secretary from 1996 to
2014. Gray has a BS in Civil Engineering from the University of
Vermont and an MBA from the University of Colorado at Denver. He is
a member of ACEC, ITE, WTS, and ASCE.
For recreation, Gray enjoys spending time with his family skiing,
camping, and relaxing at a family cabin in the mountains.
ROBERT CARLSON, PE, Chairman
Carlson has been a transportation and roadway engineer in the
consulting industry since 1973. Since joining Muller in 1984, he has
managed or served as principal-in-charge on urban, rural, and
interstate highway projects for CDOT and numerous cities and
counties. Rob served as President of Muller Engineering Company for
18 years from 1996 until 2014. He now holds the position of Chariman.
As Chairman, Rob assists with business development, marketing, and
proposal preparation for the firm. Rob has a BS in Civil Engineering
from Purdue University and is a member of ITE, ACEC (ACEC/CO
Transportation Committee and Past Board Member), and the Denver
Metro Chamber of Commerce.
Rob is a scratch bowler and also enjoys skiing, biking, and travel.
JAMES WULLIMAN, PE, Vice President, Senior
Vice President and Director of the Water Resources Group, Jim leads
stormwater and floodplain management projects with a special eye to
water quality. He has been instrumental in many of the cutting edge
water quality improvement projects in the Cherry Creek Basin
starting with the award winning Shop Creek Water Quality Project. He
also developed drainage and erosion control criteria manuals for
several public sector clients. Jim has 37 years of consulting
experience, 22 at Muller. Jim possesses a BS in Civil Engineering
from Valparaiso University and a Master's Degree in Hydraulic
Engineering from Colorado State University. He is past president of
Colorado Lake and Reservoir Management Association and a member of
Urban Water Resources Research Council, American Association of
Stormwater and Floodplain Managers, North American Lake Management
Society, and ASCE.
Jim's other interests include mountain biking, water skiing, and
home improvement projects.
MATTHEW ANDREWS, PE, Vice President,
Senior Project Manager
is Vice President and Director of Muller's Transportation Group. He
leads Muller project teams in the planning and design of
transportation facilities including rural, urban, and interstate
highways. Matt has led most of Muller's design-build projects
including the Mayhem Gulch Trail Head and Peaks to Plains Trail for
Jefferson County Open Space, and Florida Road Reconstruction and
Animas River Trail and Pedestrian Bridge for Durango. Currently he
is serving as contract manager for Muller's FHWA Central Federal
Lands Highway Division IDIQ contract. He has 25 years experience, 17
years at Muller managing projects for CDOT and other public and
private sector clients. Matt’s formal training includes a BS in
Civil Engineering from Duke University and an MBA from the
University of Colorado at Denver. He is a member of ASCE and WTS.
When not managing projects for Muller, Matt enjoys bicycling and
DEAN HARRIS, PE, Senior Project Manager,
leads Muller's Structural Engineering Group and manages a variety of
projects including the design of retaining walls, hydraulic
structures, pedestrian bridges, underpasses, sewer lines, water
lines, pump stations, and irrigation facilities. He also has
extensive experience in drainage and flood control projects.
Recently, Dean managed Muller's work for the award winning Landmark
Irrigation Water Storage and Pump Station for the South Adams County
Water and Sanitation District. As Muller's Treasurer, Dean monitors
the firm's financial performance and reports financial information
to the Board of Directors. Dean began his engineering career in 1984
with service at Muller since 1987. He has a BS in Civil Engineering
from University of Colorado at Denver and a MS. in Civil
Engineering, Hydraulics from Colorado State University at Fort
For recreation, Dean enjoys spending time with his family, camping,
golfing, and supporting his sons with their activities.
BRUCE BEHRER, PE, CFM, CPESC, Senior
Senior Project Manager for drainage and flood control projects,
Bruce leads design teams to assist public and private sector
clients. He has special skills in the design of temporary and
permanent erosion control facilities for any type of construction
project and is a trained CDOT Erosion Control Supervisor. Bruce's
major projects include lead drainage engineer on the I-25 Valley
Highway Project and the RTD West Corridor Light Rail Transit Final
design project. He has served clients at Muller since 1990, with 28
years of total experience. Bruce has a BS in Civil Engineering from
the University of Wyoming and is a member of the International
Erosion Control Association and Colorado Association of Stormwater
and Floodplain Managers.
Bruce's personal interests include skiing, snowboarding, golf,
softball, bowling, and spending time with his family.
DEREK JOHNS, PE, Senior Project Manager,
is a senior project manager in the Water Resources Group and has 24
years of experience, 15 at Muller. He plans and designs stormwater,
flood control, and stream restoration projects. Derek has extensive
experience managing projects involving stream stability, stream
restoration and bioengineering techniques, water quality and
detention basins, bridge hydraulics and floodplain evaluations, and
pedestrian trails and stream crossings. As Corporate Secretary,
Derek is responsible for corporate records and documentation of
corporate meetings and board of director activities. He holds a BS
and MS in Civil Engineering from Colorado State University.
Outside of work, Derek enjoys playing basketball, skiing, and
spending time with his family.
KARL BUCHHOLZ, PE, PTOE, Senior Project
joined Muller Engineering Company in 2008, is a Senior Project
Manager, and leads the traffic engineering section of Muller's
Transportation Group. He has 28 years of experience in consulting
and municipal traffic engineering. His areas of expertise include
traffic operations, traffic signal systems, corridor studies, and
multi-modal transportation planning. Karl leads Muller's traffic
engineering projects that include three CDOT NPS traffic engineering
contracts, traffic operations and managed lanes analyses for I-25
from SH 66 to SH 402 (CDOT), and traffic signal timing in Castle
Rock for DRCOG. Karl earned his BS in Civil Engineering from the
University of Colorado at Boulder and an MS in Transportation
Engineering from the University of Colorado at Denver. He is a
member of ITE and WTS.
In his spare time Karl enjoys running, bicycling, and golf.
ROBERT FEARNS, PE, Senior Project Manager
has 25 years of experience and has been with Muller serving as a
Project Manager since 1996. He manages transportation projects for
public sector clients including rural and urban roadways,
intersections (including modern roundabouts), and pedestrian
facilities. Bob has guided a number of local communities and
counties through the CDOT Local Agency Stewardship Program. Some of
these projects include US 287 Main Street Reconstruction in Longmont
and, recently, Reconstruction of Broadway from Wesley to Yale in
Denver. Bob holds a BS in Civil Engineering from the University of
Colorado. He is a member of ASCE.
In his spare time Bob enjoys family time revolving around the many
great outdoor activities that Colorado has to offer.
GLENN HAMILTON, PE, Senior Project
serves as Project Manager in the Water Resources Group at Muller,
and he leads the utility engineering section of the group. He
manages projects involving water supply and master planning,
reservoir and canal conveyance facilities, drainage and flood
control, channel restoration and stabilization, and structural
design. Glenn serves as Muller's client liaison with the South
Adams County Water and Sanitation District, and he is also leading a
project for CDOT to upgrade culverts along the Peak to Peak Highway,
SH 7 between Raymond and Estes Park, to improve roadway safety and
respond to damage caused by the September 2013 flooding. He has
served Muller Engineering Company for 17 of his 22 years of
experience. Glenn has a BS and an MS in Civil Engineering with a
hydraulics emphasis from Colorado State University and is a member
of the ASCE.
Glenn enjoys spending time with his family on Colorado’s rivers, ski
slopes, single-track, and hiking trails.
JOSEPH JUERGENSEN, PE, Senior Project
serves clients as Senior Project Manager for projects involving
stream restoration/open channel design, detention pond design,
bridge hydraulic analysis, culvert and storm sewer design, and
site/trail design. He also manages services during construction and
engineering fieldwork. One of Joe's recent accomplishments is the
floodplain analysis, and design of the award winning Left Hand Creek
Flood Control Project for the City of Longmont. During the September
2013 floods, the newly completed project kept 172 structures out of
the floodway produced by the storm. He joined Muller Engineering
Company in 2000 and has 17 years of total experience. Joe holds a BS
and MS in Civil Engineering from Colorado State University and is a
member of ASCE.
Outside of work hours, Joe enjoys spending time with his family,
hiking, skiing/snowboarding, and pretty much any other outdoor
activity that Colorado has to offer.
JOHN KELLER, CADD Manager
manages and oversees the computer aided drafting and production
facilities at Muller Engineering Company. He has been with the firm
since 1980, starting as a draftsman and working his way into a key
ownership position in the firm. John has also served as a
construction observer throughout his career. He has attended AutoCAD
training classes at Red Rocks Community College and Associated
General Contractors Utility Safety Seminar and Construction
Inspection Seminar by Urban Drainage and Flood Control District and
In the winter John enjoys freestyle skiing, while in the summer he
enjoys windsurfing, mountain biking, camping, hiking, and