Sandra Marquardt
Founder and President
​On the Mark Public Relations
Silver Spring, MD 20902
Phone: 301-592-0077

LinkedIn: www.linkedin.com/in/sandramarquardt 
Email: smarquardt@onthemarkpr.com
Website: www.onthemarkpr.com
Facebook: On the Mark PR
Twitter: @SandraMarquardt
SKYPE: onthemarkpr