Eric Ruijssenaars was a student of History at the University of Leiden, specialising in the history of Russia and the Netherlands and also doing minor subjects like archivistics, 16th and 17th century handwriting and Egyptology. In these days he has also been a travel guide in Egypt. He graduated on the archives of an 18th century merchant from Amsterdam, David Leeuw, and his trade with Russia. Later researches comprise amongst others the history of a 17th century painting and a 19th century Brussels branch of an English company.

He was awarded the Brontë Society Centenary Scholarship in 1993, for his research on the Brussels of the Brontës. This resulted in 2000 in the publicaton of Charlotte Brontë's Promised Land: The Pensionnat Heger and Other Brontë Places in Brussels.

After having worked in 1998-9 at Historical Bureau Verhoog & Warmerdam in Noordwijk, who specialise in writing company histories, Eric in the last years did extensive research on aspects of the Second World War. First at the War Archives of the Netherlands Red Cross and then at the Maror Foundation which dealt with Dutch Jewish war victims. For Maror, partly for genealogical research, many archives and libraries were visited and there were lots of liaisons with other archives and research institutes in and outside of the Netherlands.

Eric also is a qualified translator English-Dutch, has large experience in writing and editing texts and now in his spare time does voluntary work at the Leiderdorp Archeological Society.