There is a very clear structure and organization to the Spiritual Hierarchy.

At the head of our universe is a vast cosmic being, called Melchizedek. He holds the position of Universal Logos. At the head of our galaxy is another vast being, although not as vast as Melchizedek, called Melchior. Melchior holds the position of Galactic Logos. A little further “down” still, at the head of our solar system is another great being, called Helios and Vesta. They hold the position of Solar Logos. And finally, at the head of our planetary system is Lord Buddha, our Planetary Logos.

Underneath them are three major department heads:

1) The Manu (The position of Manu is held by a Master called Allah Gobi)
2) The Mahachohan
3) The Planetary Christ (The position of Planetary Christ is held by Lord Maitreya, who was also Krishna in a previous incarnation.)

Below them are the Seven Masters, called Chohans of the Seven Rays. The Seven Rays are seven different types of energy expressing themselves in all of creation. The Seven Chohans are responsible for the proper dissemination of these energies in our world.

Here is a simple chart showing the Rays and the Masters, or Chohans, that head them:

RAY CHOHAN ENERGY
First Ray El Morya Power/ Will
Second Ray Kuthumi Love/ Wisdom
Third Ray Serapis Bey Active Intelligence
Fourth Ray Paul the Venetian Harmony
Fifth Ray Hilarion Science and Concrete Mind
Sixth Ray Jesus (also called Sananda) Devotion
Seventh Ray St Germain (his successor: Violet Ray Master) Ceremonial Magic and Ritual

The Integrated Ascended Master both seeks to serve all the Masters of the Spiritual Hierarchy “above” him and also calls upon them for help in his own Spiritual evolution.

Author's Bio: 

Dr Joshua David Stone was one of the most influential Spiritual teachers, leaders and forerunners of our time. He had a Ph.D. in Transpersonal Psychology and was a licensed Marriage, Family and Child Counselor in California, USA.
He served as Official Spokesperson for the Planetary Ascension Movement and made his mark in the Consciousness Community as a prolific writer, authoring the 15-volume Easy to Read Encyclopedia of the Spiritual Path, published in several languages, as well as eight major Ascended Master Training Courses and several comprehensive Training Programs ranging from channeling, the psychology of astrology, the Book of Life of God, to his legendary 2,000 page Counseling Manual, and much, much more.
Today, the I AM University is the one and only Integrated Ascended Master Training Facility in this world. It stands firmly on the foundation of a comprehensive and ever-expanding curriculum which Dr Stone dedicated his life creating.
In 2005, Dr Joshua David Stone passed over to the Spirit world where he continues to Spiritually support the expansion of the I AM University the continuation of which he entrusted into the hands of Gloria Excelsias, his long-term personal assistant and protégé.
Dr Stone is one of the most widely read authors in the New Age Movement and known as the world’s most trusted source for integrated Spiritual development. http://www.iamuniversity.org

Gloria Excelsias is the President of the I AM University, an educational institution with focus on Spiritual and psychological development that was founded by the late Dr Joshua David Stone in 2004 and handed over to her care and leadership in 2005, at Dr Stone’s passing. As Dr Stone’s personal assistant, close friend and protégé, she received ongoing personal training in applied transpersonal psychology and integrated ascension which would prepare her consciousness for her later service work as the University’s President. Having moved the I AM University from California to Salzburg, Austria, her native country, she is now passionately dedicated to running and evolving the I AM University as an inspired writer and speaker, placing thematic priority on Spiritual psychology, the re-integration and updating of ancient occult teachings and the overall unfoldment of human consciousness.

Some of her service projects include:

Planetary World Service: www.PlanetaryWorldService.org

I AM Tunes – Spiritual Audio Download Library: www.IAM-Tunes.org

I AM YOU Foundation - Charity Project: www.IAMYou-Foundation.org

Ascension for Beginners – 365 free articles, 25 mini-courses and 25 meditations for newcomers on the Spiritual path: www.AscensionForBeginners.org