- Paul Stanley, Executive Vice President, The Navigators . . .
“We as Navigators, appreciate our partnership with Life Impact and the Oasis. Dave and Sheri, Oasis ministers, have served with our Mission for 32 years. Having pioneered ministries and led missionaries in three different parts of the world (USA, Eastern Europe & Russia, and Central Asia) they are thoroughly equipped to develop others to do the same. They have developed holistic cross-cultural ministries centered on Christ and His Word which fit the host culture and generated highly committed followers of Jesus who are now impacting others. . . Those who gain from The Oasis ministry will be blessed and built up for their overseas service. . . I have personally benefited from years of colaborship with Dave and Sheri. . .”

- Greg Burch -- LAM, Director of Ninos de la Luz (Children of the Light), Venezuela
". . . As someone who has spent many days and weeks with Dave and Sheri in the past, I look forward to visiting the Oasis care center. Not only do I recommend the location where they are, but I highly recommend them as a couple. With over 26 years in mission's work, Dave and Sheri are more than qualified to provide the kind of environment necessary for a missionary care center. On a personal level they have ministered to my wife and I on numerous occasions and have provided a solid example of what it means to serve Christ in ministry as a family. . . "

- Russ Guppy, Tacoma Pierce County Police Chaplaincy
". . . Besides being eminently qualified as veteran missionaries in multiple cultures, Dave and Sheri raised a wonderful family of five children (now adults) on their various fields. In our thirty-plus years of ministry, we've known no other personal friends that have accomplished more true Kingdom work than Dave and Sheri. And being among them in their home is always relaxing, fun, and encouraging! If your batteries need a little recharging, a few days with the Grissens at Sunriver will give you that boost. Know that you will be treated like special friends, loved, listened to, and served according to your needs and wishes . . ."

- Charlie Dokmo, Vice President of Internationalization, Compassion International
"I have known Dave and Sheri for over two decades, and their experience and heart for serving the Kingdom is unparalleled. I heartily recommend "Life Impact" as a ministry that will help you become more effective and reflective in your active ministry."

- Jim Roths, Former Executive Director, People International, USA.
"What a blessing to those called to serve! And what a blessing to those who are sending! As a mission sending organization in the USA, I work closely with missionaries going out and when they return for home leave. Having a resource like Life Impact and Dave & Sheri to partner with our mission and with the sending church is a valuable resource. They will provide us with additional care, equipping and mentoring through the OASIS is a valuable resource to us."

"I had the pleasure to serve with the Grissens in Central Asia as they reached out to the missionary and local community to support and encourage those in times of crisis. Having walked the road of a missionary themselves, they understand from personal experience the joys and struggles, the triumphs and tragedies that are part of the missionary experience. They also understand and are equipped to deal with the spiritual dimension of this work, recognizing that it is Satan who seeks to destroy and discourage. In addition to their years of service, their tender hearts, practical and godly counsel and willingness to take the time to listen, make them the perfect hosts to refresh, encourage, and equip those called to Christian Service."

- David Fogleboch, Barnabas International
"Experience is not the best teacher - experience with reflection is the best teacher. If you want to talk about your dreams, plans and strategy, David is your man. If you want to open up your heart and share your fears, your pains, and your greatest delights, Sheri is a great listener. Dave an dSheri are great people to be with them you need to reflect, reassess, refresh or recover. They are the right couple to walk with you for a productive retreat."

- Director for work in Limited Access and Sensitive Countries – name withheld by request
"I believe God has raised up Life Impact at a needy and important time in the work of His Kingdom. I am also convinced that David and Sheri are the right people to lead this ministry. I have gotten to know them in various contexts, and shared in the ministry with them. They are gifted and called to this key role, and have the experience required to help international workers . . . they are well aware of the pressures, stresses and trials which Christian workers experience overseas and at home. In our day, a center like the Oasis, is vital for the care and recuperation of missionaries. . . I thank God for raising up this new and vital ministry and heartily commend it to others."