Sealaska Technical Services

Sealaska Technical Services is a full-service engineering, technology integration and deployment company with a worldwide reach in the areas of water and energy management, national security, systems engineering, data management and analytics for both federal and commercial customers. 
Sealaska Technical Services Award News
Sealaska Technical Services Awarded Joint Venture U.S. Department of Energy Contract
STS and Tetra Tech awarded $400 Million DICCE 2 contract
Richland, Washington. Sealaska Technical Services (STS), LLC announced today that its joint venture with Tetra Tech, Inc. was selected as one of two awardees to provide design-build services to the U.S. Department of Energy’s National Nuclear Security Administration (NNSA). Under the Design, Integration, Construction, Communication, and Engineering II (DICCEII) contract, the joint venture will share in the $400-million contract ceiling over seven years.
The DICCE II Contract is administered by NNSA’s Office of Nuclear Smuggling Detection and Deterrence (NSDD) (formerly referred to as the “Second Line of Defense”) whose mission is to strengthen the capabilities and commitment of U.S. partner countries to deter, detect, and interdict illicit trafficking of nuclear and other radioactive materials within the interiors of partner countries, across international borders, and through the global maritime shipping system. This U.S. government nuclear nonproliferation program provides partner countries with the tools and training necessary to counter nuclear smuggling, thus making an essential contribution to the global nuclear detection architecture.
The joint venture will provide design-build services to support the installation and deployment of fixed and mobile radiation detection systems and associated infrastructure at border checkpoints, airports, seaports, internal country locations, and maritime borders outside the United States.
“Sealaska is honored to have the opportunity to help NNSA achieve its critically important global security goal of reducing the threat of nuclear and radiological terrorism” said Anthony Mallott, Sealaska President and CEO. “We look forward to working with the NNSA and our joint venture partner to make the world a safer place.”
About the National Nuclear Security Administration (
About Sealaska
Sealaska is a regional Native corporation, established under the Alaska Native Claims Settlement Act (ANCSA) of 1971. More than 22,000 Tlingit, Haida and Tsimshian shareholders own Sealaska.
Sealaska’s purpose is to strengthen people, culture and homelands. Sealaska aligns its business practices with the traditional knowledge, values and believes that has sustained Tlingit, Haida and Tsimshian people for thousands of years. There are three major business areas under the umbrella of Sealaska: Government Services (where STS resides), Natural Resources and Natural Foods.
General Manager - David Kostorowski
Phone: 509.713.5130
1200 6th Ave, Suite 800 
Seattle, WA 98101 
* please note – due to security at the building, Sealaska visitors must notify Sealaska prior to arriving to access the Sealaska Office
3200 George Washington Way
Richland, WA 99354
San Diego
3838 Camino Del Rio North, Suite 240
San Diego, CA 92108
Sealaska subsidiaries offer a full spectrum of services and solutions:
Sealaska Constructors
Vertical and Horizontal Construction services
Sensitive Compartmented Information Facilities (SCIF)
Sealaska Environmental Services
Environmental Remediation
Civil and Environmental Engineering
Environmental Planning, Permitting, and Compliance
Contact: Peter McCormick
Managed Business Solutions
Business Data Analytics
Modern Mobile Web Development
IT Assessment
Contact: Rich Mainwaring