Karen Siebert - President & CFO
W: (301) 994-0300 ext. 115
ksiebert@gmtp.net

Mark Cullison - Vice President
W: (301) 994-0300

Les Shaw - Project Manager
W: (301) 994-0300 ext. 105
lshaw@gmtp.net

Roger Walker - Project Manager
W: (301) 994-0300 ext. 106

Gary Sweitzer - Superintendent
W: (301) 994-0300 ext. 116
gary@gmtp.net

Dubby Lacey - AAA Operations Manager

W: (301) 475-2939

Mike Williams - Operations Manager

W: (301) 994-0311

gmtpshop@gmail.com

Bob Trautman - Project Manager

W: (301) 994-0300 ext.117
btrautman@gmtp.net

Janet Young - Accounts Receivables/Billing

W: (301) 994-0300 ext. 102

jyoung@gmtp.net

Brian Jarboe - Asphalt Superintendent

C: (301) 904-1674