Tom was licensed in 1960 as KN4TSJ and soon thereafter was working DX as K4TSJ
Current achievements are DXCC with 365 countries, Top of the Honor Roll; Honor Roll on Mixed, SSB and CW and 9 Band DXCC
He has also obtained 5BWAZ and WPX on Mixed, SSB and CW

In 2007 Tom was honored at Dayton by CQ Magazine by being inducted into the CQ DX Hall of Fame

DX operations as Team Leader or Team Co-Leader include K4M, AL7EL/KH9, KH9/AL7EL, ZK1XXP,  N6MZ/KH9, N2OO/KH9, N2WB/KH9 and K8XP/KH9, KH5, T32O and K5K/KH5K on Kingman Reef

Other operations include ZS/N4XP, 9M0OO, 9M6AAC,  BV4FH, N4XP/V7, N4XP/KH5, T32O, KH6, V7, V73XP, HR, HP, DL, SM, ON,
OK, G, N4XP/GW, GD5BBG and N4XP/GD. Tom also operated
from KL7 for two years as AL7EL.  Current or past calls held are K4TSJ, AL7EL, W8FCI, K8XP, OK8XP, V73XP, ON9CXP, and OK8XP

He is a member of the South Eastern DX Club, Northern California DX Foundation, INDEXA, and The OK DX Foundation (OK)

Tom is retired from the Federal Fire Service as a Senior Fire Officer with thirty years service

Tom now owns and operates S. Thomas Harrell & Associates, LLC providing consulting services in fire protection and prevention worldwide