Have a talent for art? Are you a willing professional?

Prospective Instructors or Teachers

GNAL is always looking for experienced instructors! Please submit a cover letter describing your interests with your resume to gnartleague@gmail.com.

​Our offerings are year-round. GNAL holds adult classes, young artist classes, summer art camp and specialty programs in addition to birthday parties. 


Diane DeRogatis

My name is Diane DeRogatis and I am a certified art educator.  I am originally from New Jersey where I taught Elementary and High School art.  Since moving to Pennsylvania I continue to teach and work independently as a freelance artist.  The mediums I love working with are watercolors and acrylics.  Being a landscape artist I am totally inspired by the beautiful lakes, mountains, hiking trails and farmland of PA.


Nicole Lee

I’ve been an artist my whole life. From drawing, painting, animation, photography, filmmaking, and pottery, I’ve done a little of everything! I grew up in Feasterville, PA and am the only artist in my family.

I attended the University of the arts in Philadelphia from 2000 to 2005 and have a BFA in film and digital video. Like many others, I loved too many forms of art to focus on just one, so I studied several art forms during my college career including animation, photography, illustration, screenwriting and film.

I absolutely love Disney and the amazing art of the talented people who work for that company, so I partook in an internship program at Walt Disney World during my sophomore year of college. That was an amazing experience that taught me a lot about customer service and work ethic.

After college, I worked on the sets of many major motion pictures that were filmed in the Philadelphia area. I’ve met some truly amazing people and actors through my experiences, but eventually it was time to find more steady work. I spent some years working in marketing before I found an art center and a few paint-and-sip companies that helped me turn my love of art into a professional career. Through the art center, I was offered a role as an elementary art teacher at many different schools. Here I learned that kids are an amazing window to new ideas and creativity and it’s a lot of fun seeing where they go with it.

Working as an artist allows me to create art all the time and that is my ideal job. I am one of the rare few in the world who can say ‘I absolutely love what I do,’ and honestly mean it. I am truly grateful to have that in my life and am hoping it lasts forever!

Cyndi Philkill

Ever since I can remember I have loved art and the process of making art. I was madly in love with every art teacher I ever had. I would volunteer to help them do anything just so I could be around them and all the art supplies they had in their art closets.

Since I loved all art supplies, I experimented a lot with a variety of mediums and it was hard for me to settle on just one. When I discovered collage and the opportunity to utilize a variety of materials in conjunction with the collage, I thought “Eureka!” Since then I have been experimenting and learning all I can to improve my skill in this medium as well as tap into my passions and worldview to articulate them through my art. I see it as working to engage both my head and my heart throughout the artistic process, commanding the medium as well as having something substantial for consideration by the viewer.

I have a Bachelor of Fine Arts from Maryland Institute College of Art and an MS from Johns Hopkins University in Organization Development and training.

You can find my work here: Website


Gabrielle Sivitz

Originally trained in scientific illustration, Gabrielle Sivitz credits her father, a science teacher, amateur photographer and painter, for shaping her lifelong enthusiasm for nature and art. As an educator and artist, she has held positions at the Academy of Natural Sciences in Philadelphia and Bowman’s Hill Wildflower Preserve in New Hope. Gabrielle studied at Bucks County Community College, Moore College of Art & Design, and the Pennsylvania Academy of the Fine Arts where she focused on painting and printmaking. Gabrielle recently returned to eastern Pennsylvania after 15 years living in the Intermountain West, where she taught drawing and painting to adult students out of her own studio as well as at art centers and museums in Idaho and Montana. In 2017, she was awarded a professional
development grant from the Idaho Commission on the Arts with the National Endowment for the Arts. Gabrielle wants her students to enjoy art and embrace the learning process. Her classes and workshops are geared toward having fun and accepting mistakes. “When we’re kids we naturally draw and paint for fun and we don’t worry about the results, but as we get older we become much harder on ourselves. We accept the myth that artists are born with some magical ability that we don’t have, and so we give up. In reality, it just takes practice. It’s all about training yourself to see like an artist, and having fun along the way.” For examples of Gabrielle’s work you can check out her website.

Doug Tweddale

I have been an artist my whole life. I remember being nine years old and oil painting with my Uncle Lester Gallagher, an artist from the Midwest who loved painting the sand dunes of Lake Michigan. For the last 30 years, I have been a pastel artist, and for half of that time I have studied with Master Painter Albert Handell. Now that I have retired, I have the wonderful opportunity of making painting my first priority as I travel this beautiful country with my wife Sue. So far, we have been on two three-month extended trips to many National Parks out West. I’ve attained signature member of the Pastel Society of America and the Pastel Society of the West Coast. A story of our 2015 journey and my travel art work was just published in the August issue of the Pastel Journal. During our travels, I conduct “Living the Dream” Plein Air Workshops to share my artist’s knowledge and experience with students as we enjoy painting our treasured National Parks.  You can checkout his artwork at his website. 

Jason Rodriguez

I started drawing Sesame Street’s Ernie and Bert at the age of two, and from then on I couldn’t stop filling sketchbook after sketchbook. In highschool I attended the School of the Arts in Charleston, SC as a Visual Arts major. However, in college, I started to question the purpose of art which led me to give up on it and major in something “useful.” It wasn’t until my mid 20s (while I was in seminary of all places) that I realized I was created to be an artist and that creating art was one of my deepest joys. It was on an iPad in a program called Procreate that I started drawing again. I especially liked the “undo” button and the diversity of true to life brushes. Creating on the iPad got me back into drawing, and eventually I returned to physical/traditional media. I now use both digital and traditional tools to illustrate; for example, I will ink or watercolor a picture and load it into the iPad to utilize the breadth of tools available in a digital workflow. Being part of an Art Community has also been crucial to this journey. I am actively engaged with the Society of Visual Storytelling, an online art school and art community for illustration. I am a major proponent of self paced learning, challenging yourself and finding what’s available to you to improve your craft. Currently, I am homeschooling my own little artists, freelance illustrating and running a custom portrait studio. You can see my personal and custom work at www.jdrpictures.bigcartel.com and follow me on social media at www.instagram.com/jdr_pictures and https://www.facebook.com/jdrodpictures

Russell Magee

As a lifelong reader and writer, I believe that in order to write one must have determination and a pen. I am here to fuel that determination, to inspire and encourage, and help guide the pen. I was President of the Writing Room at Montgomery County Community College for two semesters encouraging and coaching students in creative writing and hosting various open-mic events. It was an experience that I cherish, one that allowed me to both lead and instruct as well as facilitate the creative process of writing. I was also a frequent contributor to the Montgazette and the Art & Literary Magazine during my time there. I won the Patricia Nestler Creative Writing Award two years in a row in both the fiction and poetry categories, and I’ve also had a piece published by the popular online magazine Thought Catalog. Writing is truly a passion of mine, and my goal is not only to guide and enkindle great works of writing–works to be proud of – but to also inspire that passion in others as well. You can check Russell’s work out at his website.


Jessica Libor

Jessica Libor is an artist from Philadelphia, PA who creates work that deal with beauty, desire, nature, and feminine experience.  Myths and legends often influence her work, and she works in oils, watercolor, ink, pastel and precious metals. Jessica’s aesthetic is influenced by the Rococo and Pre-Raphaelite periods of art history, as well as theater, set design, high fashion culture. The feminine figure is central in carrying the piece or telling a story, with her surroundings often mirroring her state of mind. Jessica received her Master of Fine Arts from the Pennsylvania Academy of the Fine Arts in 2014.  Since then, she has been painting, exhibiting her work, teaching art at Harcum College and as a visiting artist at various other universities.  Jessica is also the founder of Era Contemporary Gallery, having curated over 10 exhibits so far.  She currently divides her time between Philadelphia, PA and New York, NY. You can check Jessica’s artwork at her website.


Betz Green

When very young I would collect bits of nature while hiking in the countryside of Berks County, go home to set up a still life with the found objects, and then draw, draw, draw. This experience developed my perception and discipline. After attending youth classes at Kutztown University, receiving a scholarship to attend Pennsylvania Governor’s School for the Arts and then Tyler School of Art, I married fellow artist Jim Green. While raising two artsy children I honed my own skills by creating commissioned children’s portraits and house portraits. Later I became the cover illustrator for Montgomery County Town and County Living Magazine and co-founded Montgomery County Guild of Professional Artists. I jury area art shows and have won numerous awards in regional, national and international shows including gold and silver medals at Audubon Artists Inc. in NYC at the Salmagundi Club, Allied Artists of America, also in NYC, Philadelphia Water Color Society, Phillips Mill, the Philadelphia Sketch Club and regularly exhibit at Historic Yellow Springs. My work has been featured in galleries, including as invited artist at a recent dual exhibition at Stover Mill Gallery, museum shows and many private collections.

I reside just outside Philadelphia with Jim, a few chickens, and too many gardens. Teaching art to adults has become a passion, and as I am constantly experimenting with different materials and techniques to create various portfolios of work, in the classroom I enthusiastically pass on what I have learned.

Please check out my website betzgreen.com


Jim Green

After graduating from Temple University’s Tyler School of Art and completing several business courses, I owned and operated a commercial construction business for 30 years. I have now turned my full attention to a career in the fine arts. My studio and the home I share with my artist wife Betz are located outside Philadelphia.

I have exhibited and won prizes for my work in many juried shows and gallery exhibitions including Allied Artists of America, Audubon Artists Inc., both located in NYC, Stover Mill Gallery as an invited artist in a recent dual exhibition, Phillips Mill in New Hope and Historic Yellow Springs in Chester County. Besides jurying regional art shows, I give art lectures, demonstrations and workshops on my painting methods. Over the last few years I have also enjoyed instructing classes at non-profit art organizations.

I create oil paintings using vibrant colors in an impressionistic style with an expressionistic twist. As for subject matter, that includes whatever inspires me in that moment.

Having very little interest in social media, my website is limited, but you are welcome to visit it at artbyjimgreen.com