Mike Christmas

Tetra Tech India Ltd. engages in the provision of consulting, engineering, program management, and construction management services. The company was founded on April 4, 2017 and is headquartered in New Delhi, India.

RPS Mountainheath Ltd. provides laboratory analysis services. The company is headquartered in Abingdon, the United Kingdom.

Part of Tetra Tech, Inc., Hoare Lea Europe Ltd. is a British company founded in 2008 that is committed to making every client's vision a reality. The company is based in Almondsbury, UK. The company takes personal responsibility to achieve a shared vision and have the expertise, determination, and ingenuity to make it happen.

O'Melveny & Myers LLP provides legal services. Its practice areas include labor and employment, litigation, tax, and transactions. The firm serves high-tech companies in the areas of legal advice related to software licensing, intellectual property, and venture capital investments. The company was founded by Henry William O'Melveny in 1885 and is headquartered in Los Angeles. CA.

AECOM Global II LLC provides engineering services. The company is headquartered in Los Angeles, CA.

North Associates (Cumbria) Ltd. provides property asset management and planning consulting services. It specializes in acting directly for the landowner and asset holder, identifying, unlocking and maximizing the value of building and land assets, delivering planning permissions and disposal strategies to maximize speed of return, and managing projects from inception to completion be it to point of sale, acquisition, development or relocation. The company was founded by Andy Ross and Mark Walker in 2011 and is headquartered in Cumbria, the United Kingdom.

Part of Tetra Tech, Inc., WYG Engineering (Northern Ireland) Ltd. is a consulting company based in Belfast, UK. WYG Engineering (Northern Ireland was acquired by Tetra Tech UK Consulting Group Ltd., part of Tetra Tech, Inc. from July 10, 2019 on March 31, 1999. The British company was founded in 1987 and provides consulting services.

Part of Tetra Tech, Inc., Tetra Tech Group Ltd. functions as an investment holding British company. The company is based in Leeds, UK and was founded in 2008.

Part of Tetra Tech, Inc., Tetra Tech Management Services Ltd. is a British company that provides surveying services. The company is based in Leeds, UK. Founded in 2003.

Part of Tetra Tech, Inc., Tetra Tech Ltd. is a British company that provides engineering consulting services. The company is based in Leeds, UK. Tetra Tech was founded in 1985 and was acquired by Amey Ltd from Tetra Tech UK Consulting Group Ltd. on July 01, 2010.

Tetra Tech Environment Planning Transport Ltd. provides environmental, planning, and management consultancy services. The firm provides consultancy services in designing, planning, engineering, environmental, transport planning, project management and social development. Its services include conservation management plans, design of investigations, procurement of services, contract management and monitoring, documentary research, provision of commercial historic environment advice to developers, public inquiries, public outreach, participation and events, building analysis and recording, characterization and appraisals, excavation, field evaluation, geophysical survey, measured and topographical survey, and watching briefs. The company was founded on April 26, 1995 and is headquartered in Leeds, the United Kingdom.

Signet Planning Ltd. provides planning and urban design services. It serves the business and industry, education and health, energy, leisure, sport, and tourism, minerals and waste, pub, restaurant, and hotel, residential development, and retail and economic planning. The company was founded by Simon Wallace Chadwick, James Edward Hobson, and Ian Reginald Rowe in 2005 and is headquartered in Leeds, the United Kingdom.

Part of Tetra Tech, Inc., Tetra Tech Canada, Inc. is a Canadian company that provides consulting engineering, program management, construction management and technical services. The company is based in Vancouver, Canada.

INDUS Enterprise Solutions, Inc. provides information technology support services. Its services include software development, database design, system administration and maintenance, systems integration, software and network engineering, web services-enabled solutions, and information systems security. The company was founded by Aaron B. Floyd in 1986 and is headquartered in Vienna, VA

GeoTrans, Inc. provides environmental engineering and remediation services. It serves the automotive, aerospace, manufacturing, energy, petrochemical, transportation, and telecommunication industries. The company was founded in 1979 and is located in Sterling, VA.

California Institute of Technology provides education focusing on science, engineering, academia, business, and public service. The company was founded in 1891 and it is headquartered in Pasadena, CA.

Tetra Tech UK Holdings Ltd. is a holding company, which engages in the provision of environmental engineering, technical, and consulting services. The company was founded on August 17, 2006 and is headquartered in Reading, the United Kingdom.

Tetra Tech Tesoro, Inc. provides construction services. It also build schools, hospitals, and clinics for selected commercial and private clients. The company was founded on June 4, 1997 and is headquartered in Virginia Beach, VA.

Part of Tetra Tech, Inc., Coffey International Development Ltd. provides development consultancy services. The company is based in Reading, UK. Coffey International Development was acquired by Tetra Tech Coffey Pty Ltd., part of Tetra Tech, Inc. from March 09, 2016 on March 06, 2006 for $6.13 million.

Part of Tetra Tech, Inc., Coffey UK Ltd. is an investment holding company. The company is based in Reading, UK. Coffey was founded in 2006.

Tetra Tech NUS, Inc. provides environmental, engineering, remediation and information technology consulting services. The company is headquartered in Pittsburgh. PA.

ARD, Inc. operates as an international development services consulting firm. The firm provides water resources and infrastructure, agriculture and economic growth, environment and natural resources, land tenure and property rights, democracy, governance and knowledge management services to international development customers. The company was founded by George C. Burrill and James R. Nolfi in 1977 and is headquartered in Burlington, VT.

Tetra Tech Construction, Inc. provides planning and development services for wind energy. The company was founded by Timothy E. Delaney in 1966 and is headquartered in Gloversville, NY.