NDOT Senior Staff

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Rudy Malfabon, P.E. - Director

Malfabon, Rudy headshot(1)Rudy Malfabon has worked for the Nevada Department of Transportation for more than 25 years. As director, he is responsible for the daily operations of the department that has an annual operating budget of over $800 million and close to 1,750 employees.

Mr. Malfabon began his career at NDOT in 1984 as an inspector on the Flamingo Road interchange at Interstate 15 in Las Vegas. As an assistant resident engineer, he was the sole representative of NDOT on privately-funded projects at the Colorado River Bridge in Laughlin and the Summerlin Parkway interchange at U.S. 95 in Las Vegas. After earning his professional engineering license, Mr. Malfabon became a resident engineer and managed the construction of several interchanges and grade separations on U.S. 95 in northwest Las Vegas. Nearly half of Mr. Malfabon’s NDOT career was spent in Carson City, where he held the titles of assistant and chief construction engineer.

In 1998, he accepted the position of state construction engineer for the Washington State Department of Transportation. Mr. Malfabon was then recruited by Jacobs Engineering in Las Vegas in 2000, where he worked for three years as manager of Jacobs’ construction management services in Nevada. After being away from NDOT for nearly five years, Mr. Malfabon returned on July 7, 2003 when he was appointed to the position of deputy director for Southern Nevada, a position approved by the Nevada Legislature in mid-2003 to provide a director’s office presence in Las Vegas.

As NDOT director, Mr. Malfabon seeks to further enhance communication, coordination and customer service with local agency partners, elected officials, contractors and the general public to prioritize transportation funding needs, projects and activities across the state.

Mr. Malfabon chairs the American Association of State and Highway Transportation Officials' Standing Committee on Highway Traffic Safety, which encourages, recommends and supports highway safety programs to reduce highway crashes and promote national health and economic growth. He has also served on two research panels for the National Cooperative Highway Research Program, dealing primarily with construction management issues. Mr. Malfabon is a graduate civil engineer from the University of Nevada, Reno, and is a registered professional engineer in Nevada and Washington. His hobbies include camping, fishing, and gardening. He resides in Carson City.

Bill Hoffman, P.E. - Deputy Director

BillHAs deputy director, Mr. Hoffman is responsible for assisting the director in the daily operations of NDOT.

Mr. Hoffman began his employment with NDOT in February 1991 as an engineering technician in District Two. He became a rotational engineer in 1996 and worked within District Two on various construction projects. He then moved into the Bridge Division and served as a bridge designer for five years. From there, Mr. Hoffman worked in the Construction Division as the quality assurance engineer and most recently as the chief of the Maintenance and Operations Division. In this role, he administered several of the NDOT’s statewide programs in the areas of Highway Maintenance, Roadway Operations and Facilities Management. Some of the programs under his direction included the Integrated Transportation Reliability Program (ITRP), which implements new and innovative projects to reduce congestion and keep Nevada moving, the I-80 Corridor Coalition Program, which focuses the efforts of several western states to improve winter mobility along Interstate 80, and the Maintenance Accountability Program (MAP) to establish a customer service approach to statewide NDOT maintenance activities. He also oversaw vital motorist services such as NDOT’s 511 Nevada Travel Info and Freeway Service Patrol as well as support to the nearly one million person hours dedicated yearly to NDOT road maintenance duties. Mr. Hoffman chaired several national winter maintenance committees during his tenure as chief maintenance and operations engineer.

Mr. Hoffman graduated from the University of Wyoming in December 1990, with a Bachelor’s Degree in Sports Marketing. While at Wyoming, he also played football and earned All-Conference and Honorable-Mention All-America honors. He returned to college in 1993 and graduated from the University of Nevada, Reno in December 1996, with a Bachelor’s Degree in Civil Engineering. He is a registered Professional Engineer in the state of Nevada.

Tracy Larkin-Thomason, P.E. - Deputy Director, Southern Nevada

Larkin Thomason, Tracy Photo Aug 2013Tracy Larkin-Thomason is NDOT deputy director for southern Nevada, with statewide responsibilities for NDOT's three engineering districts and the civil rights program with a focus on coordination of NDOT southern Nevada activities.

Ms. Larkin-Thomason has more than 25 years of transportation experience, beginning her NDOT career in 1987 in the right-of-way division. She worked seven years in Roadway Design, three years in the Structural division, five years as District II traffic engineer and engineering service manager, six years as District II maintenance engineer and most recently, four years as assistant director of planning.

In this position, Ms. Larkin-Thomason seeks to improve communication, coordination, and customer service with local agency partners, elected officials and the general public. She has served on several National Cooperative Highway Research Program (NCHRP) panels and scans on a variety of subjects including asset management, cost of maintenance and fiscal constraint compliance and currently serves on four AASHTO and TRB committees including Strategic Management and the MAP 21 Implementation and Reauthorization Committee.

Ms. Larkin-Thomason has Bachelor of Science degree in Civil Engineering and a Master in business Administration, both from the University of Nevada, Reno.  She is a licensed Civil Engineer in the state of Nevada. Ms. Larkin-Thomason is also certified as an ITE Professional Traffic Operations Engineer, a Nevada Certified Public Manager and is a past president of the Nevada Certified Public Managers Society.

David Gaskin, P.E. - Deputy Director, Stormwater

Gaskin, David cropAs Deputy Director of NDOT's statewide Stormwater Management Program, Mr. Gaskin oversees environmental programs, including policy, regulatory and education efforts to manage stormwater involving state roads and transportation facilities in accordance with state and federal laws.

He also works closely with other agencies to help preserve clarity and reduce pollution in the stormwater and other water runoff from roads and road projects.

Mr. Gaskin has more than 22 years of experience managing environmental programs at the Nevada Division of Environmental Protection.  He also worked to construct and operate large solar power plants in the Mojave Desert and was an officer in the U.S. Navy.  

Mr. Gaskin is a registered professional mechanical engineer and holds a degree in astronautics from the Massachusetts Institute of Technology (MIT).

Cole Mortensen, P.E. - Assistant Director, Engineering/Chief Engineer

Cole Mortensen

As Assistant Director of Engineering, Mr. Mortensen is in charge of NDOT’s pre-construction engineering sections, including Project Management, Design, Bridge, Environmental, Location, and Right-of-Way. His focus is on project delivery and ensuring that NDOT’s projects are of the highest quality and delivered on time and within budget. In this role, Mr. Mortensen supervises six groups within NDOT headquarters, representing more than 300 engineering and right-of-way professionals responsible for developing all engineering work necessary in delivering design plans and specifications used in the construction of NDOT projects.

Mr. Mortensen began his NDOT career in 2002 as an associate engineer in the Design Division, before spending six years in the Structures Division and advancing into project management roles in 2009. As NDOT project manager, Mortensen oversaw development of the state’s largest public works project, Project Neon, and has been a leader in the department’s alternative project delivery aimed at most efficiently and quickly constructing road improvements.  

Mr. Mortensen holds a bachelor’s and master’s degree in civil engineering from the University of Nevada, Reno and is a registered civil engineer in Nevada and California. He enjoys the outdoors, including hunting and camping with his family. 

Robert Nellis - Assistant Director, Administration

Robert Nellis for badge idRobert Nellis serves as NDOT Assistant Director of Administration.  In the role, Mr. Nellis oversees four divisions including Financial Management, Accounting, Administrative Services and Information Services.  Through sound budgeting, financial and administrative practices, the divisions under his oversight play a proactive and supportive role in ensuring the success of the Department's goals and objectives. 

Mr. Nellis has 20 years of experience in private sector real estate development, business management, public land management, and energy program management. He has been with the State of Nevada since 2004 and was head of the State Land Office in the Division of State Lands for five years. Mr. Nellis administered the Nevada Land Bank for the Nevada-Tahoe Resource Team and was responsible for all statewide transactions and permits on lands managed by the Division. In 2009, Mr. Nellis accepted a position at the Governor's Office of Energy (GOE) as the American Reinvestment and Recovery Act (ARRA) Project Director. As a result of his work on ARRA, the GOE was recognized by the federal government in 2012 as one of two states to have successfully implemented the ARRA program on time and within budget. During his tenure at the GOE, Mr. Nellis also led the development and implementation of new financing programs, the creation of an open source software portal to streamline permitting processes, and secured additional federal funding sources for the GOE.

Mr. Nellis is a Nevada Certified Public Manager with a bachelor's degree in business administration and master's degree in communication. He is also currently pursuing advanced certification and training in public-private partnership finance, transportation finance, and bond finance. Mr. Nellis earned the Eagle Scout Award in 1986 and is also the father of an Eagle Scout. He has been married for 21 years and enjoys hiking, skiing, and other outdoor activities with his wife and five children.

Sondra Rosenberg, PTP - Assistant Director, Planning

Rosenberg, SondraAs Assistant Director of Planning, Sondra Rosenberg oversees eight divisions within NDOT: Program Development, Multimodal Planning, Performance Analysis, Research, Roadway Systems, Safety Engineering, Traffic Information and Southern Nevada Planning.

 Ms. Rosenberg has a Bachelor's of Science degree in Physics from the University of Rochester and a Master of Science degree in Transportation Technology and Policy from the University of California, Davis. She is a certified Professional Transportation Planner and is active in the Northern Nevada Section of the American Planning Association.

Ms. Rosenberg has worked at NDOT since 2008 and prior to that she was a transportation planner for Fehr & Peers, a consulting firm. As the Federal Programs Manager in NDOT Planning, Sondra managed the I-15 Mobility Alliance and the I-11 & Intermountain West Corridor Study. She effectively built coalitions that consisted of neighboring state DOTs, Metropolitan Planning Organizations, economic development councils, chambers of commerce, businesses and various other stakeholders.

Thor Dyson, P.E. - Assistant Director, Operations

Assistant Director of Operations Thor Dyson

Thor Dyson serves as NDOT's Assistant Director for Operations and is responsible for the Construction, Materials, Equipment, Traffic Operations and Maintenance and Asset Management divisions. He is responsible for administering the construction program, implementing strategies for pavement preservation, keeping the NDOT fleet mobile and managing traffic operations. 

Mr. Dyson received a bachelor of science degree in civil and environmental engineering from Utah State University in 1986. He passed his Engineer in Training examination before graduation, and holds professional engineering licenses in Nevada and California. While attending Utah State University, he spent his summers working for the U.S. Bureau of Reclamation. A one-year hiatus from the university allowed him to visit Brazil and attend school to learn Portuguese.

After graduation, Mr. Dyson worked in Sun Valley, Idaho, and performed structural engineering for three years. In 1989, he joined the Nevada Department of Transportation in the rotational engineering program.

Before completing the rotational engineering program, Mr. Dyson joined the District II office as a staff engineer for snow, ice, and construction projects along the eastern Sierra, Nevada/Tahoe, and District II desert areas. He was assistant resident and resident engineer for highway construction contracts from 1994 to 1997. From resident engineer, he moved to assistant District II engineer for maintenance and then to assistant District II engineer for construction until he was named District II engineer in 2003.

Mr. Dyson is a 2005 graduate of the State of Nevada Certified Public Managers Program and enjoys, kayaking, skiing, bicycling, and other outdoor activities.

Mary A. Martini, P.E. - District I Engineer

Mary MartiniIn July 2004, Mary Martini relocated to Las Vegas from Portland, Ore., to begin her career with NDOT as the District I engineer. District I encompasses the southern half of the state, is the largest geographically, and includes Las Vegas, the fastest-growing metropolitan area in the nation.

Ms. Martini is responsible for District I operations, including the administration of approximately half billion in annual construction projects, as well as the maintenance of the highway system and appurtenances. Traffic operations in the Las Vegas valley are controlled by the Freeway and Arterial System for Transportation. Known as FAST, the system is a coalition of NDOT, the Regional Transportation Commission of Southern Nevada, and local agencies. Ms. Martini represents NDOT and oversees the state-of-the-art facility that houses both FAST and the Nevada Highway Patrol.

Prior to joining NDOT, Ms. Martini was the director for surface transportation in the northwest for URS Corp. She led a business practice in highway and bridge engineering for Oregon, Washington, and Alaska. URS recruited Ms. Martini from the Oregon Department of Transportation, where she worked for 20 years. Ms. Martini began as a construction inspector/survey crew chief and over the years served as a bridge designer, project manager (resident engineer) for construction, district manager for maintenance, and regional construction engineer. Ms. Martini is a graduate of the Oregon Institute of Technology with a B.S. in civil engineering and an A.E. in structural engineering. She also holds an M.B.A. from Colorado State University.

Mike Fuess, P.E., PTOE - District II Engineer

NDOT District II Engineer Michael FuessIn September 2018, Mike Fuess was named NDOT District II engineer. In this role, he will oversee maintenance and construction of approximately 1,350 miles of state road across northwestern Nevada, including roughly 120 miles of interstate, stretching from Lovelock to the Nevada-California border and between Hawthorne and the Oregon border. His duties include regional oversight of NDOT construction and maintenance projects, including winter maintenance of the highest Sierra roadway pass to be kept open year-round, traffic engineering and operations as well as permitting of special uses of state roadways for events, utility work and more. 

Mr. Fuess began his NDOT career in 2003 as a staff professional engineer before being promoted to engineering services manager and district traffic engineer. Since 2013, he has served as District II Engineer for Maintenance, overseeing maintenance of state roadways across northwestern Nevada. He is a registered professional engineer in Nevada, Idaho and Washington. 


Boyd Ratliff, P.E. - District III Engineer

D3 Engineer Boyd Ratliff

In June 2017, Boyd Ratliff was named NDOT District III engineer. Mr. Ratliff is responsible for District III operations, including more than 325 miles of interstate and U.S. routes, and more than 15 state routes and a broad expanse of rural northeastern Nevada. The western boundary begins on I-80 at Imlay and runs for 265 miles to West Wendover on the Nevada/Utah border. The northern boundaries begin at the Nevada state lines with Oregon and Idaho and extend south approximately 300 miles.

Mr. Ratliff joined the department in 2010, serving first as District Support Engineer and then District Traffic Engineer. Most recently he served as Assistant District Engineer in Elko, directly overseeing NDOT construction and maintenance crews in Elko-area regional offices. 

Prior to his years at NDOT, Mr. Ratliff worked at various private engineering firms in geotechnical and construction management positions. He completed a Bachelor’s Degree in Geology from Idaho State University. He is a registered Professional Engineer in the state of Nevada. He enjoys his family and the outdoors.


Sean Sever - Communications Director

Sever Sean June 2012Sean Sever serves as communications director for the Nevada Department of Transportation. In this role, Mr. Sever oversees the media, public information, multimedia, customer service, public hearings, and photography/video sections. He also serves as the department liaison to the Nevada Legislature. 

Mr. Sever previously served as energy outreach coordinator for the Nevada Governor’s State Office of Energy, public information officer for the Public Utilities Commission of Nevada and Western Nevada College, and general manager of the Piñon Plaza Casino Resort.

Mr. Sever has a journalism degree from the University of Nevada, Reno, and has served as chairman of the Carson City Convention and Visitors Bureau. He is a Nevada native and a graduate of the Carson City Leadership and State of Nevada Certified Public Manager programs.

Mr. Sever and his wife have three children. In his free time, he enjoys running, playing basketball, hiking in the Desolation Wilderness, attending UNR games, and doing fun things with his family.