This script will add local admin accounts to ssh_access group in Mac OS X. (10.7 or higher. May also work in 10.6)

add_localadmins_to_ssh

#!/bin/bash

# set the input for lazy convenience
IFS=$' '

localadmins=$(/usr/bin/dscl localhost -read /Local/Default/Groups/admin GroupMembership | awk -F': ' '{print $2}')

for account in `echo $localadmins`; do
    # add additional blocks like >> && ! [ "$account" == "username" ] << for additional exclusions
    if ! [ "$account" == "root" ] && ! [ "$account" == "itstech" ]; then
        userID=$(/usr/bin/dscl localhost -read /Local/Default/Users/$account | grep GeneratedUID | awk '{print $2}')
        if [ "$userID" != "" ]; then
            # We first need to test if the access_ssh group exists and create it if it doesn't
            /usr/bin/dscl localhost -read /Local/Default/Groups/com.apple.access_ssh > /dev/null 2>&1
            rc=$?
            if [[ $rc != 0 ]]; then
                /usr/bin/dscl localhost -create /Local/Default/Groups/com.apple.access_ssh
                /usr/bin/dscl localhost -append /Local/Default/Groups/com.apple.access_ssh RealName 'Remote Login Group'
                /usr/bin/dscl localhost -append /Local/Default/Groups/com.apple.access_ssh PrimaryGroupID 123
            fi
            /usr/bin/dscl localhost -append /Local/Default/Groups/com.apple.access_ssh GroupMembership "$admin"
            /usr/bin/dscl localhost -append /Local/Default/Groups/com.apple.access_ssh GroupMembers "$userID"
        else
            echo "$account has no local GUID"
        fi
    fi
done