Cornerstone is led by a pastoral staff team of three members. The pastoral staff is responsible for the preaching and teaching of the Word of God, administering the sacraments, providing missional leadership, and faithfully carrying out pastoral care and work.

  • Bill Johnson Lead Pastor

    Hailing from the Midwest, Pastor Bill is married to his wife Marla and has three adult children - Christine, Sarah, and Daniel. Pastor Bill received an undergraduate degree in psychology from Wheaton College. His graduate degrees include an M.A. in educational psychology and counseling at University of Nebraska-Lincoln, an M.A. in Religion as well as an M.Div from Westminster Theological Seminary. Pastor Bill then went on to complete a Doctor of Ministry at Trinity Evangelical Divinity School, writing his dissertation on spiritual formation. His ministry experiences include pastoral positions in local churches in Nebraska, Minnesota, Michigan, Ohio, and overseas in Panama and Honduras. He is currently ordained in the Brethren Church and in the Evangelical Free Church of America, but in the process of transferring ordination to our denomination, the Evangelical Covenant Church. Pastor Bill was called as our new lead pastor in July 2014.

  • HoJin Yoo Young Adult & Executive Pastor

    Pastor HoJin was born and raised in New York City, departing to the University of Illinois at Urbana-Champaign to receive a B.A. in Economics. After committing to God's call to ministry, he attended Gordon-Conwell Theological Seminary for his M.Div. He was ordained in our denomination, the Evangelical Covenant Church, in 2015 and has been serving at Cornerstone since 2009. Pastor HoJin and his wife Julie have been married since 2014.

  • Danny Yoon College & Worship Pastor

    Pastor Danny is a Massachusetts native and a die-hard Boston sports fan. He completed his undergraduate studies at the University of Massachusetts in Amherst, majoring in communication and minoring in psychology, and his graduate studies at Gordon-Conwell Theological Seminary, where he obtained his M.Div degree. Pastor Danny is a certified CrossFit trainer and a licensed minister in the Evangelical Covenant Church and has been serving Cornerstone since 2011. He is happily married to his wife Eunjee.


The Leadership Team (LT) at Cornerstone is a group of congregation-approved members who oversee the church both spiritually and operationally. It is a group made up of between 5 and 9 people that operate on year-long terms starting in August. In many other churches, the analogous leadership is structured as Elders and Deacons.

On the operational side, the LT oversees church finances, makes sure we have a place to worship, and takes care of other business matters. On the spiritual side, the LT makes sure the Pastoral Staff has accountability and are taken care of and keep a general pulse of the congregation’s health. The overall goal is to maintain Cornerstone’s health as a Christ-centered community. Who is currently on the Leadership Team? The LT currently consists of 6 members plus our Lead Pastor, Bill Johnson.

  • Ernie Park Chair

    Ernie has been attending Cornerstone for over seven years since his freshman year at MIT. He grew up in New Jersey and is a huge New York Rangers/hockey fan. Previously, he has served on the Worship Ministry with his voice and has also led the Welcoming Ministry. He lives in Cambridge with his wife, Tina, who was also on Leadership Team previously, and their two dogs. They both work as software engineers in Cambridge.

  • Abe Lee Vice-Chair & Leadership Development

    Abe has been attending Cornerstone for the past nine years, ever since he first started school at Boston University. In addition to serving as a community group leader, he has served for seven years on College Ministry, both as a student and as a young adult on College Core Team. He is a product manager in Back Bay and he is also an avid fan of sports, both playing and watching (while probably screaming at the TV).

  • Eugina Lim Membership Chair

    Eugina attended Cornerstone through undergrad at Boston University and is currently working in Back Bay as a tax accountant. She has served in the past as the Finance Chair on the Leadership Team, a Core Team member of the Welcoming Ministry, and a campus leader during her time in college. Eugina loves meeting new people and has a heart to see a culture of prayer grow at Cornerstone.

  • Katia Joo Pastor Care

    Wherever Katia might be in the world, she has called Cornerstone her home church since she was an undergraduate student at Boston College. She serves in the Prayer Ministry and is part of the Justice Think Tank under the Compassion, Mercy & Justice Ministry. She works in Cambridge and has a side hustle as a dog sitter since she's not able to have a dog of her own during this season in her life.

  • Jennifer Chung Nominating Chair

    Jennifer has been attending Cornerstone since 2012 after moving to Boston from upstate New York. She has served as the leader of the Offering/Tithes Team, community group leader, and one of the leaders of the Operations Ministry. Jennifer works at MIT as a tax accountant in the Institute's central finance office. She enjoys spending time with family and her rambunctious dachshund, Toby.

  • Priscilla Cheung Secretary

    Priscilla has been attending Cornerstone since completing undergrad at Bowdoin College in 2006. She grew up outside of Boston and loves to calligraphy, read, and eat good food. This is her second tenure serving on the LT and she was also part of the Pastoral Search Committee that brought in Pastor Bill. Her previous church involvement included serving on the College Ministry and being a community group leader. She is a clinical psychologist and lives in Boston with her husband, Aaron, who is a mental health clinician, and their son Logan.

  • Andrew Lee Finance Chair

    Andrew has been attending Cornerstone since he was an undergraduate student at Boston University and is now working in Copley Square. He lives in an overcrowded house of brothers-in-Christ in Allston and is currently serving in Children’s Ministry and has served in the past as a community group leader.

  • Minnie Kim

    Minnie has been attending Cornerstone since 2010 when she moved up to Boston for work. She is originally from Long Island and attended college in Baltimore. Previously, she has served on Family Ministry, Children’s Ministry, Young Adult Ministry, and Welcoming Ministry. Minnie works down the street in Back Bay and lives in Newton with her husband, Bo, and children -- Josiah, Ellie, and a fur-child (i.e. dog) Davy.

spiritual overseers

The Spiritual Overseers at Cornerstone are members of our church, approved by the congregation, called to care for the church, be willing and able to both teach and discipline the church, protect and guard the congregation (from false teachings), and be devoted to the ministry of the Word and prayer (Acts 6:4).

  • Stuart Kim

    Stuart has been attending Cornerstone Church since 2006 as a sophomore at Boston College. Cornerstone Church has played a major part in Stuart’s spiritual journey; it was where he accepted Christ, got baptized, discovered his spiritual gifts, and met his wonderful wife, Alina. Stuart’s mission in life is to equip and empower God’s people by leveraging his spiritual gifts, especially regarding biblical masculinity, faith in the workplace, and servant leadership. Stuart grew up in New York but just recently became comfortable saying he is a Bostonian. Stuart lives in Watertown, MA with Alina and their son Malachi.

  • Aaron Cheung

    Aaron has been attending Cornerstone since his undergrad at Boston College in 2005. He graduated from Gordon-Conwell Theological Seminary with a degree in counseling and is currently working at Boston University Student Health Services as a Staff Therapist. He previously served on college core, Cornerstone short-term missions, welcoming team, young adult community group leader, and is currently serving on communion team, family ministry team, and as a spiritual overseer. He grew up south of Boston and is currently living in Dorchester. He is married to Priscilla and father of the Wolverine (their son's name is Logan).

  • Dana Lee

    Dana has lived in Boston and attended Cornerstone for 15 years. She’s married to a handsome husband, Chris, and has beautiful daughter named Karis (and is expecting their second child soon!). Dana has served on various ministry teams such as Prayer, College, Community Group Leaders, Missions, Outreach, Vitality, and so on. She’s currently working as a UI Designer and hopes to go back to teaching/coaching in the future. She loves playing volleyball, trying new food, and building relationships with people. She hopes to connect with you in the future.

  • David Yuh

    David has been attending Cornerstone for nine years since moving to Boston for his residency. He is a big Chicago and Illinois sports fan having grown up in Chicago and attended the University of Illinois as an undergrad. He currently works as a physician in Boston and his previous church involvement includes having served on the Leadership Team for four years. He lives in Watertown with his beautiful wife, Faith, who works in healthcare improvement and currently serves on the Family Ministry Core Team, and their two children Aidan and Emily.

  • Kevin White

    Kevin is a Detroit native who finds himself trapped on the East Coast. He currently works as a software engineer at HubSpot in Cambridge while residing in East Somerville. He started attending Cornerstone in 2011 at the suggestion of an MIT classmate who was helping him church hop. After a three-year stint while attending school, he returned to Cornerstone in 2016 after a two-year hiatus in Detroit. While he enjoys playing board games and sports, Kevin would really like to once again race around the world's longest race track, the Nürburgring, as he did in July 2018.

  • Paul Ahn

    Paul has been attending Cornerstone since 2004, the same year he finished undergrad at Boston University. He grew up in Southern California and is an avid Lakers fan. Paul has previously served in various capacities at Cornerstone in the past on the following teams: Leadership Team, Compassion, Mercy, and Justice, Offering and Tithes, Vitality Team, Young Adult Team, Welcoming Team, and Worship Team (but only to manage the PowerPoint slides). Paul works in Cambridge as a software engineer and lives in Watertown with his wife, Nadesha, and their two daughters, Gabrielle and Josephine.

Ministry Interns

Seminary students and graduates who attend Cornerstone often serve as ministry interns under the care and guidance of the pastors. These interns, who are both current and past students, serve in various capacities at our church while pursuing their degrees.

  • Chris Lee

    Chris grew up in Queens, New York. To receive his B.A. in English Literature from Fordham University, Chris read and wrote on a lot of books by dead people. Throughout college, Chris was actively engaged in missions work in Haiti, which made him an obvious fit for leading the Global Missions Ministry at Cornerstone. Chris completed his M.Div degree at Gordon-Conwell Theological Seminary. Chris is married to his best friend, Esther.

    Chris currently serves as the Director of Justice Initiatives and Global Missions, with the oversight of Pastor Bill.

  • Janet Lee

    Janet grew up in Massachusetts and has never left. She received a B.M. in Piano Performance from the New England Conservatory by playing a lot of piano. She is currently working towards an M. Div and M.A. in Counseling at Gordon-Conwell Theological Seminary. She hopes to complete her dual degree in 2020. She loves to laugh and appreciates coffee on an emotional level.

    Janet currently serves as the leader of the College Ministry Core Team, with the oversight of Pastor Danny.

  • Stephanie Suh

    Stephanie has been attending Cornerstone since 2015 as a senior at Wellesley College, where she received a B.A. in Media Arts and Sciences (MAS) and English Literature. Cornerstone is the church where Stephanie met and accepted Christ and where she developed a love for the local church. She is currently working towards a M.Div. and M.A. in Counseling at Gordon-Conwell Theological Seminary. Stephanie currently serves in the Prayer Ministry and Young Adult Ministry; she loves meeting up with people and hopes to get to know more people at Cornerstone - so if you see her around, please say hi!

    Stephanie currently serves as the leader of the Young Adult Core Team, with the oversight of Pastor HoJin.

  • Daniel Choi

    Originally from the Chicagoland area, Daniel came to Boston to attend Brandeis University as an undergraduate student to study music. While at Brandeis, Daniel served as a campus leader for Cornerstone's College Ministry and a worship leader at our church. Most recently, Daniel started his M.Div degree at Gordon-Conwell Theological Seminary in his pursuit of full-time ministry. 

    Daniel is currently serving on the Worship Ministry Core Team, with the oversight of Pastor Danny.