Fast Facts | Our History | Philosophy & Vision | Principals | Locations
Richard K. Tanaka, PE
Chairman of the Board
Principal in Charge
In 1973, Richard joined Mark Thomas & Company, becoming a firm principal in 1979 and its president in 1999. Tanaka has more than 37 years' experience in planning, design, and construction of municipal and transportation projects. Over the course of his career, he has developed an extensive knowledge base of policies and design procedures for numerous agencies and cities within the Bay Area. His record of excellence in managing and meeting fast-track schedules for projects has brought great financial value to our clients and helped them meet public needs. As a firm principal, Richard has traditionally led and managed its most complex and multifaceted projects.
Education: M.S. in Public Works Administration,
University of Santa Clara; B.S. in Civil Engineering, University
of California at Berkeley
Registrations: Registered Civil Engineer in California
Affiliations: American Public Works Association,
Engineer's Club of San Jose, American Society of Civil Engineers,
Japanese American Citizen's League
Mike Lohman, PE
President
Principal in Charge
A member of Mark Thomas & Company since 1982 and firm principal since 1996, Mike became chief operating officer in 2007, and president in 2011. Mike began his engineering career with the firm and has more than 28 years' experience in municipal and transportation engineering, working with municipalities, resource agencies, and Caltrans. He brings extensive experience in planning and designing roadways and infrastructure improvements throughout California, and in managing environmental clearance for those projects. In addition to design, his expertise includes handling all aspects of right of way, drainage systems, utility placement, pedestrian traffic, and railroad crossings.
Education: B.S. in Civil Engineering, University
of California at Berkeley
Registrations: Registered Civil Engineer in California
Affiliations: American Society of Civil Engineers,
American Public Works Association, ACEC East Bay Chapter- Past President
Robert A. Himes, PE
Principal in Charge
Rob's able management of the ever-increasing number of projects and staff in the Sacramento office has led to his position of company principal. Rob serves as regional division manager for the Sacramento and Fresno offices. He is responsible for overseeing Mark Thomas & Company's Sacramento and Central Valley operations as well as managing large, complex transportation and municipal projects. A Mark Thomas & Company veteran since 1986, Rob is known for his innovative geometric solutions for complex problems.
Education: B.S. in Civil Engineering, University
of California at Berkeley
Registrations: Registered Civil Engineer in California
Affiliations: ACEC – Sierra Chapter, American Society
of Civil Engineers, Institute of Transportation Engineers, American
Public Works Association
Jimmy W. Sims, PE
Principal in Charge
As one of our leading transportation engineering experts, Jimmy holds the position of principal and regional division manager. He leads the transportation and municipal operations in the South Bay region out of our San Jose office, overseeing the San Jose, Oakland, and San Mateo offices. His municipal, transportation, and infrastructure experience spans more than 25 years. Jimmy has managed the planning, design and construction of more than $500 million of roadway and site improvements for Cities and Agencies throughout Northern and Southern California.
Education: B.S. in Civil Engineering, California
Polytechnic State University, Pomona
Registrations: Registered Civil Engineer in California
Affiliations: American Society of Civil Engineers
– Member
Sasha D. Dansky, PE
Principal in Charge
Sasha’s professional experience centers on highway and municipal transportation planning and design. His technical background and understanding of the project development process allows him to serve clients at all stages of a project, from conceptual design to preparation of construction documents. He joined Mark Thomas & Company in 1996, was promoted to Associate in 2006 and became Principal in 2010. Sasha manages the Walnut Creek operations and is responsible for overseeing projects in the North Bay.
Education: B.S. Civil and Environmental Engineering, University of California at Davis
Registrations: Registered Civil Engineer in California
Affiliations: American Society of Civil Engineers, ACEC-Golden Gate Branch
Leonard J. Sequeira, PE
Principal in Charge
Leonard has more than 29 years of planning, design, and inspection experience involving highways, industrial and port facilities. He has hands on experience with Caltrans design policies and procedures and has delivered over $1.7 billion in construction projects in Southern California over the last nine years. Leonard was the founding principal at MTS and in 2011, merged the MTS team with Mark Thomas & Company. As principal and regional division manager, Leonard manages the Irvine operations and is responsible for overseeing projects in Southern California.
Education: M.S. Civil Engineering, Texas A & M University 1990; B.S. Civil Engineering, University of Engineering & Technology, Pakistan, 1981
Registrations: Registered Civil Engineer in California
Affiliations: American Society of Civil Engineers, Women's Transportation Seminar