[3] On January 8, 1837, he married Mary Catherine Willard in London, Ohio, and later moved to Farmington in Knox County, Illinois.

[1] Geer settled east of Salem in the Waldo Hills and began building a nursery using the apple and pear seedlings he carried with him across the plains to Oregon.

[2][5] Geer spent time as a teacher, imported English sheep to Oregon in 1858, and was a pioneer of flax growing in the Willamette Valley.

Several companies of men were organized in response to the war and in 1848 Geer served as Captain of one assigned to protecting the Willamette Valley.

[8] In July 1868 he was elected Clerk of Marion County and served a single two-year term, leaving office in June 1870.