Co-Founders


Margery Miller
Founder

President and Owner of PeopleBiz Inc., Margery helps people think! She works with people who are ready to get out of the box and lead more productive, purposeful, meaningful lives. A seasoned business veteran, she owned and managed a manufacturer’s rep agency for 29 years before selling it to her employees and putting her focus on coaching and consulting through PeopleBiz, a side business during her rep years.  She helps people master the business of life. She founded Great Girls Network in 2014 to help women stop comparing and competing, find their inner voice and stand up and be counted. She recently published Confessions of a Recovering Helpaholic, the first of the Great Girls Network Series of books.  The second in this series, Sound Business Bites is coming out in summer 2019.


Susan Hoff
Co-Founder

Chief Strategy, Impact & Operations Officer of United Way Dallas, is a visionary leader and a great connector of people. She is an active member of Social Venture Partners Dallas and has served the non-profit community for many years, especially as an advocate for children and education. Susan started her non-profit career as the Executive Director of Educational First Steps and she is still committed to improving the quality and availability of early care, social emotional development and education for ALL children under the age of five. She sees her role at United Way as part of the process to fundamentally change our community for the better.

Leadership Team


Neely Duncan

As a member of BKD’s National Not-for-Profit group, Neely has more than 17 years of audit and advisory experience in public accounting. Neely also served in the United States Navy for four years. Neely’s expertise includes financial statement audits, single audits, grants management and compliance, outsourced accounting functions, standards implementation, internal audit procedures, strategic planning and tax-exempt matters for a wide range of not-for-profit entities. Neely also performs forensic work related to various cases, internal controls consulting, as well as consulting for healthcare practices. In addition to handling the accounting and audit needs of her clients, she advises clients on operational efficiencies, internal controls, governance issues, and routinely shares best practices with clients gained from working with a variety of organizations. She is a highly sought national speaker on technical matters in the accounting community.


Claire Goldman

A recent graduate of Hendrix College in Conway, Arkansas, where she studied Psychology and Spanish. She has always had a passion for working with non-profit organizations, and worked with several throughout her college career. It was through her work at a domestic violence emergency shelter and a sexual assault crisis response program that she recognized her ability to strongly connect with and help other women. Currently, Claire is exploring her options for a graduate degree in Counseling Psychology. She has taken a greatly desired job at Dallas Afterschool and enjoys volunteering as an advocate for Dallas CASA.


Amy Halman

Amy is an award-winning, holistic skin therapist, speaker and product development specialist in the natural beauty industry. She is committed to companies known for integrity of product and and bettering the planet. As president of ACURE, she developed a successful indie brand, winning prestigious beauty awards like Allure Magazine’s Best of Beauty in both 2015 and 2016. In 2017, she opened EcoBlend Therapies to create Deeper Beauty Conversation within the beauty industry. She strives to actively connect each client’s unique body wellness, nutrition, lifestyle, and energy levels to optimize performance of the skin, naturally. If you would like a consultation with Amy, Book Here!


Lea Kaltenbach

Currently serves as Director of Strategic Alliances for The Carter Group, a transition planning consulting firm that helps companies and institutions successfully relocate their facilities to new physical spaces. She directs business development globally and in particular the opening the Dallas market and educating prospects in the value of these services. Lea is active in Corenet, a global commercial real estate industry organization, where she was President of the Southwest Chapter and co-chaired one of its national conferences. She has also served as the National Woman’s Membership Chair and Marketing Committee Member of the Industrial Asset Management Council (IAMC).


Madhura Kulkarni

Maddy is the Founder and Executive Director of Dallas Heroes Project, an organization whose mission is to drive awareness of the positive impact heroes are making in our city. DHP creates month-long marketing campaigns around the hero and his/her organizations so citizens become more aware of the issues these heroes are tackling and then get inspired to get involved. She is also currently a Marketing professional at PepsiCo and is on the Advisory Boards for Social Venture Partners Dallas, Children at Risk, the UT Dallas Undergraduate Marketing program, and the PR Committee of the Dallas Arboretum.


Alida Leykauf

Alida enthusiastically creates cohesive marketing solutions for brands and engages communities with brands and causes by building partnerships. With a background in finance and an MBA, Alida initially pursued analytical roles at large global and mid-sized companies. Over the past couple of years, she transitioned to creating marketing and social media strategies and content in the non-profit and social venture space. She finds purpose in bringing awareness, through marketing efforts, of causes that will benefit and build the community.  Alida currently serves as our Director of Digital Marketing.

Maggie Ong’ele

is an attorney and consultant in the criminal justice reform space. She began her career in Dallas as an Assistant District Attorney, after which she transitioned into a general corporate practice as Associate General Counsel for a North Texas rural hospital system and later as Of Counsel for a criminal justice reform-related nonprofit organization.  Maggie holds a Doctor of Jurisprudence degree from the University of Houston Law Center and a Bachelor of Science degree in Government from the Texas Woman’s University. She enjoys the arts, the outdoors, learning for its own sake, and exploring through travel, reading and hearing about how people in various circumstances live – especially women.


Toni Portmann

CEO & Executive Chairman of the Board of DHISCO, a hospitality technology distribution provider that connects 100,000 hotel’s rooms and rates through 11 billion monthly transactions to online travel companies worldwide. With over 30 years of management experience, Toni has served as CEO of three other companies and on the boards of public, private and non-profit companies. Toni is a member of WCD (Women Corporate Directors) and is an investor in Texas Women Venture Network, serving on their Portfolio Advisory Board.


Mary Kate Powers

Mary Kate Powers has a passion for people and for making a difference. This dedication has been carried from her involvement in the community into her career. Mary Kate made the move to Dallas to enter the marketing world in May 2015, one week after graduating from the University of Arkansas. After getting married to a UT Law student, Mary Kate made the move to Austin and continues her membership and leadership with Great Girls Network remotely. From account and project-managing, to creating and executing strategy, to relationship-building and more, Mary Kate has experience with several facets of marketing. With her expertise, she has contributed to tremendous improvements in the online presence and overall branding of companies of various sizes and industries. In Austin, Mary Kate is taking her skill set to the next level to work in business development for a recruiting agency specializing in marketing and advertising placements. Mary Kate looks forward to trying new things (and a new career!) and continuing to be a part of the amazing GGN community from Austin.


Kathryn “Tate” Ringer

Kathryn “Tate” Ringer has over 15 years of executive experience in consulting, healthcare services and technology. Her diverse background includes serving as CEO of the fourth largest pediatric home care ECI agency in Texas and a 30 year old diversity hiring program to COO of a boot-strapped start-up serving social ventures and launching the Texas branch of a $42M Series B funded Silicon Valley start-up in home care technology. The common thread among Tate’s diverse experience is her commitment to set visionary strategy in complex environments backed by sound analytics to manage risk. Tate has a servant leadership philosophy combined with an uncompromising determination to both meet bottom-line goals and support the people who are the backbone of the company.


Lynne Sipiora

Most recently served as Executive Director of the Samaritan Inn of McKinney, the only homeless shelter in Collin County, which she turned into a transformation center enabling residents to complete a program and re-enter the workforce and build productive lives. After retiring from that position, she has continued her volunteer work and currently works with SparkTankdfw.com offering a competition empowering social entrepreneurs to change the world.

Sameen Wajid

Sameen has globe trotted from teaching at an orphanage in Pakistan to studying social and political conflict in Ireland to pursuing a Fulbright English Teaching Assistant-ship on the island of Borneo. While in Dallas, she was a Marketing Associate at an education nonprofit where she helped lead the organization’s marketing and communication projects through the creation of websites and digital and print publications. Currently, she lives in NYC and works at UNICEF as a data communications consultant. She earned her masters at the Harvard Graduate School of Education and her bachelors at Austin College. Sameen is also a website developer and created the GGN website that you’re currently browsing! If you’re interested in creating or upgrading your website, send her an email.


Judy Watson

Judy has found in her decades of teaching, team building, fund raising or promoting artists that encouraging others to believe in themselves is her greatest gift. She has been gratified with a successful career that has allowed her to share some of her strategies and connections to benefit our community. She greatly enjoys what she learns from others. She loves being a part of GGN so she can affirm and learn from our strong growing community!