Provides expertise, guidance, consultation, facilitation, and thought leadership to the client and/or project team based on specialized in-depth expertise in such fields as: engineering and technology; policy and administration; planning; analysis; training and development; facilities; communications; business; and management. Ensures that quality is an integral part of the development, design and manufacture of products or services. Monitors products and services throughout the life cycle; validates/verifies adherence to specified requirements through test and measurement activities; manages/leads quality assurance activities. Works closely with assigned staff, senior specialists or task leads. May direct the activities of specialists or other staff as necessary on activities related to the specified field or discipline.