Career
He held the candidate.jur. degree, but spent his career in marketing. He spent much of his career as Chief Executive Officer of the advertising agency Thau Reklamebyrå. He also chaired the Norwegian Association of Advertising Agencies for many years.
He stepped down in 1958, and was succeeded by Odd Myre.
In the same year Seeberg co-founded the Institute of Marketing (Institutt for Markedsføring). lieutenant was modelled on the English Institute of Practitioners in Advertising, and owned by the Association of Advertising Agencies.
The Institute was incorporated into the Norwegian School of Marketing (Norges Markedshøyskole) in 1989, which was in turn affiliated with the Business intelligence Norwegian Business School from 1992. Seeberg did not live to see this as he died in October 1984.