If you would like to learn more about Keystone Coaching & Consulting, have a question, or would like to have a free trial coaching session, please read through the page below. You can contact us via phone, fax, email, postal mail, or by filling out the contact form below. Keystone Coaching & Consulting 22 Cherry Street Holland, MI 49423 Phone: 616.396.1517 Fax: 616.396.1517 (same number – listen to the message before sending fax) Email: mderoo@keystonecoach.com