R.W. Senior Warden William Slater IIThe R.W. Senior Grand Warden is 41 year-old William Slater II, the owner and President of Wm. Slater & Sons, Inc, which operates a series of mortuaries in the Pittsburgh area. He was graduated from the Valley Forge Military Academy in 1976, Thiel College in 1980, and the Pittsburgh Institute of Mortuary Science in 1980.

He served as Worshipful Master of Lodge No. 45, Pittsburgh, in 1987 and was Representative to the Grand Lodge from 1987 to 1990. In 1992 and 1993, he served as Sword Bearer for R.W. Grand Master Edward H. Fowler, Jr., and was elected to serve the past two years as R.W. Junior Grand Warden.

In York Rite, Bro. Slater is a member of Royal Arch Chapter No. 268 Liberty Valley Council No. 50, Royal and Select Master Masons; and Duquesne Commandery No. 72, Knights Templar. He is a Scottish Rite Mason in the Valley of Pittsburgh and is serving as an officer of the Consistory. He is also a member of Syria Temple, A.A.O.N.M.S.; The Royal Order of Jesters, Pittsburgh Court No. 2; Islam Grotto; and the Cinosam Club, where he served as President.

He is involved in various professional and community activities, including the National and Pennsylvania Funeral Directors Associations, Mount Washington Chamber of Commerce and Community Development Corp., the Pennsylvania Association of Notaries, and the Green Tree Rotary Club, where he is a Paul Harris Award recipient.

Bro. Slater is married to the former Maria D. Arena of Allison Park. The couple has a three-year-old daughter and a two-year-old son. He is a member of Wallace Memorial Presbyterian Church, Pittsburgh, where he has served as a deacon and on the Christian Education Committee.