Staff & Board of Directors


Image Credit: Grant Leighton

Samantha Johnston joins the CPAC staff as Executive Director in September of 2015. A photographer, arts administrator, and educator, she made the move west to Denver from the East Coast in 2010. Samantha holds a certificate in Arts Development and Program Management from the University of Denver, an MFA from Lesley University College of Art & Design, and her BFA from Alfred University. A committed educator, she taught photography and visual arts for twelve years before joining our staff. She is a longtime member of the Society for Photographic Education, and in 2013 became the treasurer for the Southwest region of SPE. She co-chaired a Southwest regional conference (Letters to an Emerging Artist) in 2013 in Denver. Her work has been shown in numerous exhibitions nationally, and she continues to be an active artist in the community. email:


Mariana Vieira, Education Coordinator

Mariana Vieira, Education Coordinator


Mariana Vieira joined CPAC in August 2014. She is a mixed-media artist living in Boulder, CO. She earned her MFA from the University of Colorado at Boulder and worked as Studio Coordinator of Photography and New Media at Anderson Ranch Arts Center. Her work has been included in numerous exhibitions nationally and internationally. Mariana teaches workshops in photography and mixed media, and is an instructor at the University of Colorado at Denver.  Originally from Brazil, Mariana spent part of her life living in Central America before moving to the United States. She loves shooting medium format film cameras. email:

Christine V

Christine Ann Verhoeven , Administrative Assistant


Christine Ann Verhoeven is a mixed–media artist living in Denver, CO, who primarily works with analog photography and metalsmithing. She joined CPAC in 2015 after receiving her BFA from Metropolitan State University of Denver. She has exhibited work in various galleries and magazines, and has received multiple awards. She was born in Harrogate, England, and lived in Germany before moving to Colorado in 1997. email:





Board of Directors

If you are interested in being a CPAC board member, please complete this form and return by email to Subject line: “Board Application.” Applications are reviewed twice annually. If you are selected for consideration, you will be contacted for an interview. Allow up to three months for the process to be completed.

Gary Reed (Chair) graduated from the Art Institute of Colorado in photography, and since 1991 has been the General Manager of Reed Art & Imaging. From 2004 – 2010 he co-managed the Reed Photo-Art Gallery in Denver’s Art District on Santa Fe and in 2005 became an art district board member. He is currently the Treasurer / VP and has been an integral part of their growth and success. Still an avid photographer, he occasionally exhibits and sells his work in various local galleries and art fairs.

Donna Altieri (Fundraising Events Committee Chair) has lived in Colorado since 1970 and holds a BA from Connecticut College (back then COCOforWO) and an MA in English and Education from Columbia University, NYC. In 1980, she started Altieri Instrument Bags (AIB), a basement business that evolved from her passion for design and a tuba-playing friend who needed a custom backpack bag for his instrument. AIB moved from the basement, to an enterprise center, to a 1960’s building a block from home, while growing into an international business. Donna writes that she has been lucky enough to travel around the world, for business and for fun, with her trusty Minolta and now digital Nikon always on her shoulder.

Sarah LaVigne (Co-Chair) is Photo Editor for 5280 magazine. A native of the East Coast, she has been a photo editor at National Geographic Adventure, Men’s Journal, Best Life, and SKI magazines. Sarah holds and MFA in Photography from Pratt Institute in Brooklyn, New York, where she began her career in picture making and editing. Her photo editing work has been honored by the American Photography Association’s AP25 and an SPD Merit Award. She also produces “Picture Society” screenings, curates fine art photography shows locally, and does professional portfolio reviews around the country.

Bob Lay (Treasurer): Bob graduated from the University of Denver with a BS and MAcc in Accounting. He has 20 years experience in all aspects of finance and accounting in organizations of all sizes. He has helped build and develop teams and work within organizations to improve their overall performance. Currently he works as a Principal at Adam James International , a premier executive recruiting firm that helps world class companies find premier talent to fill their critical staff needs. He is an active CPA in the State of Colorado.

Suzi Moore McGregor: Born and raised in the Arizona desert, Suzi Moore McGregor has spent most of her adult life viewing the world through her lens.  Over the years her work has appeared in the New York Times, Time, Newsweek, American West, Audubon, Sierra, National Wildlife, Wilderness, and various other national and international publications.  She is the recipient of numerous awards for her fine art images. Suzi Moore McGregor is also the author of “Under the Sun,” published by Little Brown & Co. and the co-author of Living Homes:  Sustainable Architecture and Design, published by Chronicle Books.  She currently resides in Denver, Colorado.

Haley Jane Samuelson (Secretary): Haley Jane Samuelson was born and raised in Denver, Colorado until the age of thirteen when her family relocated to Amsterdam, The Netherlands. It was there she first fell in love with photography. After ten years in New York City, she recently relocated back to Colorado, where she is now acting as the Chair of the Exhibitions Committee at the Colorado Photographic Arts Center and teaches at Metropolitan State University. Her work has been shown at art fairs across the globe, including Photo LA, Photo Miami and Art Basel. In June 2009, she had her first NYC Solo Show, “Another Room” which was well-received, gaining some publicity, most notably a short review in The New Yorker by Vince Aletti. A second solo show followed at Housprojects Gallery in 2012. Her work has been published in several international magazines including Zoom Magazine, Oxford American Photo France, and Korea Photo+ among others.

Valerie Santerli (Education Chair) joined the board in July 2012. She received her photographic education from the University of Northern Colorado, where she earned a B.A. in 1998. While studying there, she had the opportunity to work under the tutelage of famed mural artist, Leo Tanguma, assisting on several projects which can be seen throughout Colorado. In 2003 Valerie became a dedicated volunteer at Working with Artists and in 2005 became the Associate Director of the organization. In 2011 she resigned from her position at WWA to once again follow her personal artistic goals. Valerie is currently Gallery Manager at RULE Gallery in Denver, a position she has held since 2007.  She also works for Evan Anderman Photography and does freelance photography in the Denver Metro area.

Paul Sisson: Originally from Minneapolis, MN, Paul has lived in Colorado since 1998. He received his BFA in photography from the University of Colorado Denver, graduating with high honors in 2013. Paul is now a local artist represented by Michael Warren Contemporary and a member at Ice Cube Gallery. He began contributing to CPAC as an intern in 2011 and began working as the Installation Manager in 2013. In addition to being on the Board of Directors Paul also serves on the Exhibition Committee.

Keith Brenner: Mr. Brenner has over 40 years of diversified business experience in North America, Africa, Europe, and Asia. This experience is divided between holding senior marketing and general management positions with large international companies and managing or investing in a dozen small entrepreneurial companies. In all positions, he was involved in marketing or strategic planning. Mr. Brenner has also held seats on the Board of Directors with several companies both private and public.



Mark Sink is founder and director of MoP (Month of Photography) in Denver, Colorado, where he coordinates over one hundred eighty regional galleries, museums and art spaces biannually to celebrate photography. The most recent MoP took place March-April 2015. In addition to curating extensively for MoP projects, Mark regularly curates exhibitions at MoP’s host venue RedLine, where he is currently a resource artist.

Mark is also an internationally recognized photographer in his own right. In 1991, he co-founded the Museum of Contemporary Art / Denver and opened his own gallery space, Gallery Sink. He is a regular portfolio reviewer for the Houston FotoFest Meeting Place, SPE, and Photolucida. He is always looking for unique talent for his many ongoing curatorial exhibitions, projects and collection placements, and regularly places the artists he reviews with various gallery and museum exhibitions.