Leadership Structure

You could say that Jesus is the lead pastor of our church. We believe that Jesus is our true leader and head. We believe that Jesus provides his church with leaders who give their lives to serve and care for the church. Jesus gave the church a few offices to help structure leadership. First, we are lead by what we call elders or pastors. Second, we also have deacons who function in a lead servant role. Third, our members function as an office. We believe that membership at the church is an important commitment that comes with responsibilities to live out the "one anothers" of the faith and to be involved in the direction and decision making of the church.

Staff Pastors


bland mason, Lead Pastor

In 2010, Bland planted City on a Hill in Brookline. Bland enjoys spending time with his wife, Teresa, and their three kids - Jordan, Hannah, and Sarah. Bland has committed his life to Boston/Brookline and likes to read in the areas of theology, philosophy and culture. He holds M.Div. and Ph.D. degrees and has taught theology courses for several years as adjunct faculty at Southern Seminary and Gordon-Conwell Seminary. Bland also serves with Baseball Chapel as chapel leader to the Boston Red Sox.

EM: bland@coahchurch.org

TW: BlandMason


Mike Hong, Pastor of Worship and Mission

As pastor of worship and mission, Mike oversees the discipleship of the church through the Sunday worship gatherings and leading musicians in the worship ministry. He also facilitates partnerships with outside organizations and ministries, which includes anything from local neighborhood non-profits to overseas ministries in other countries. 

A resident of the Boston area since 1999, Mike spent several years working with InterVarsity Christian Fellowship at Boston College before enrolling at Gordon Conwell Theological Seminary in 2008 to pursue an M.Div. He joined City on a Hill's staff in the summer of 2011. Mike and his wife Tanya have two children, Alina and Mark. 

EM: mike@coahchurch.org

TW: WMHong


Lay Elders


Jeff Johnson, Lay Elder

Jeff and his wife Abby have been married for over 10 years and have a vibrant young daughter, Eliana. They started attending City on a Hill in the fall of 2012 after having moved around quite a bit. While they are both working professionals, their real passion is for building community and entering into the beautiful mess of real relationships.

EM: jeff@coahchurch.org


Suny Liaw, Lay Elder

Suny moved to Boston in 2014 with his wife, Yen (who serves as our treasurer), and two boys, Isaac and Caleb. Suny serves as an attending physician at Children's Hospital in the palliative care area. Suny focuses his time as an elder by coaching community groups and teaching the occasional class. Suny became an elder in 2017.

EM: suny@coahchurch.org


Matt Harris, Lay Elder

Matt and his wife Sue (who's a deaconess at the church) have been married for over 35 years and became Christians a few years into their marriage. Having grown up in the Boston area, both of them came face to face with the true message of God's grace later in life. They have two grown children and three grandchildren. Matt is an engineer by training and currently a handyman by trade. Matt enjoys sailing, skiing, and hiking

EM: matt@coahchurch.org


Kaleb Chang, Lay Elder

Kaleb has been married to Celina since 2010. They have one child, Jesse, and own a home in Roslindale. Kaleb is a data specialist, and he previously served as a deacon at Redeemer Presbyterian Church in New York City. Kaleb became an elder in 2017, and he now serves at City on a Hill as an elder and community group coach.

EM: kaleb@coahchurch.org


Deacons and Staff


Ashley Williamson, Director of Operations

Ashley oversees the day to day operations of CoaH and is a point of contact for those who are in the CoaH community and those looking to get involved. Ashley moved to Boston from Texas in 2016 and began working at CoaH in 2017. She holds a Master of Social Work from Boston College. When she is not at work, she can be found reading, exploring new places, and spending time in the great outdoors. 

EM: ashley@coahchurch.org


Tyler Speck, Kids Director

As the CoaH Kids Director, Tyler is responsible for overseeing CoaH's children's ministry. After graduating from college with a degree in human resources, he followed a call from God to move to Boston and hopes to eventually plant and pastor a church  in the area. Currently he is pursuing a Master of Divinity degree from Southern Seminary. In his spare time, Tyler likes to take pictures around New England, run, and hike.

EM: tyler@coahchurch.org

TW: Specktb


Shane Pratt, Technical Intern

Shane was born and raised in South Africa, but is the child of an American. After much prayer and deliberation, Shane moved to the US and got immediately plugged in with City on a Hill in 2014. Shane serves as our technical intern on top of managing a sweet youtube page

EM: shane@coahchurch.org


Emmanuel Okharedia, Deacon & Pastoral Intern

Emmanuel is a lawyer and musician. After studying marketing and French at CSU San Bernardino, he moved to Boston to pursue law and make disciples in the city. Emmanuel has a heart for racial reconciliation, enjoys playing basketball, and likes fashion. 

EM: emmanuel@coahchurch.org


Aaron Peters, College Director & Church Planting Resident

Aaron is a church planting resident at City on a Hill Brookline as he prepares to start a new church in Brighton through the CoaH network.  He also oversees the college ministry, facilitates partnerships with campus ministries, and coaches community groups in Allston/Brighton. Aaron and his wife Emily are pursuing foster care and adoption in the Boston area and call Brighton home.

He has been working in ministry since 2011 and joined the staff at CoaH in 2017. He holds a B.A. in Middle Grade Education from the University of North Caroline at Charlotte and a M.Div from Southeastern Seminary. He enjoys reading, writing music, playing guitar, and watching baseball.

EM: aaron@coahchurch.org

TW: aarondpeters

FB: aarondanielpeters


Steven Castello, Community Groups Director & Church Planting Resident

Steven is a church planting resident at City on a Hill Brookline and also serves as the Community Group Director, giving direction to CG Coaches and Leaders through equipping and training. He and his wife, Amy, have four daughters (Lily, Addisyn, Karis, and Amelie) and reside in Roslindale.

Steven has been in ministry since 2004 and came on staff at CoaH in Summer 2018. He holds a B.A. in Human Development and Family Studies from Samford University and is pursuing a M.Div from Birmingham Theological Seminary. He enjoys spending time with his family, reading, listening to music, and watching sports.

EM: steven@coahchurch.org

TW: @stevencastello


Mollie Dykstra, Deaconess

Hailing from the Pacific Northwest, Mollie, her husband and their daughter lived overseas before making a home in Brookline, MA in the spring of 2012. A graduate of Trinity Western University, she worked at Focus on the Family (Canada) before choosing to follow her dream of being a stay at home wife and mother. Having a vested interest in the spiritual development of children at CoaH, Mollie became the deaconess of CoaH Kids and helps the ministry in many ways. She enjoys spending time with her family, traveling, and all things retail.


Kayla Woodworth, Deaconess

Kayla came to Boston from upstate New York to pursue her Master of Music at the New England Conservatory of Music in viola performance. Along the way she found City on a Hill and quickly became more involved. She served on staff for a short period of time and now lends her organizational skills as needed on Sunday's to oversee set-up and teardown. Outside of work and church Kayla enjoys spending time with family and friends, exploring Boston/New England and playing softball with the CoaH Cannonballs.


Sue Freeman, Deaconess


Gakii Masunga, Deaconess